AC Charge 134a on a 93 cherokee sport
Hi All,
I bought a 93 cherokee sport a half year ago and the guy told me the ac does not work. I checked the repair records and saw a r134a conversion and charge by a professional in 2004. I tried charging it myself today. I located the low pressure port (bottom one on the back of the compressor with blue cap). First the system wouldn't except any gas, it just made the dial on the can of coolant shoot up and then the connector would hiss off when I removed it. Hmmmm, noticed that the compressor didn't turn on. Checked the forums and found out to jumper the low pressure switch. I was pleased to note that the compressor runs. However, when I connected the 134a coolant, expecting it to suck it up the gas, it once again did not seem to want to accept gas. Is there another valve that I need to open? Does anyone have any suggestions for how to trouble shoot this? I figure that I would just waste cans if I had a leak. That is why I think this behavior is kind of odd. I'm probably missing something easy here. Thanks for your help. Best, Breton |
Re: AC Charge 134a on a 93 cherokee sport
On 7 May 2007 10:20:38 -0700, breton <bretonh@gmail.com> wrote:
>Hi All, > >I bought a 93 cherokee sport a half year ago and the guy told me the >ac does not work. I checked the repair records and saw a r134a >conversion and charge by a professional in 2004. I tried charging it >myself today. I located the low pressure port (bottom one on the back >of the compressor with blue cap). First the system wouldn't except any >gas, it just made the dial on the can of coolant shoot up and then the >connector would hiss off when I removed it. Hmmmm, noticed that the >compressor didn't turn on. Checked the forums and found out to jumper >the low pressure switch. I was pleased to note that the compressor >runs. However, when I connected the 134a coolant, expecting it to suck >it up the gas, it once again did not seem to want to accept gas. Is >there another valve that I need to open? Does anyone have any >suggestions for how to trouble shoot this? I figure that I would just >waste cans if I had a leak. That is why I think this behavior is kind >of odd. I'm probably missing something easy here. > >Thanks for your help. > >Best, >Breton If you want to do this yourself properly I suggest you borrow, rent or buy a set of gauges for R134 systems ans see what pressures you actually have when compressor is running. ----------------- TheSnoMan.com |
Re: AC Charge 134a on a 93 cherokee sport
On 7 May 2007 10:20:38 -0700, breton <bretonh@gmail.com> wrote:
>Hi All, > >I bought a 93 cherokee sport a half year ago and the guy told me the >ac does not work. I checked the repair records and saw a r134a >conversion and charge by a professional in 2004. I tried charging it >myself today. I located the low pressure port (bottom one on the back >of the compressor with blue cap). First the system wouldn't except any >gas, it just made the dial on the can of coolant shoot up and then the >connector would hiss off when I removed it. Hmmmm, noticed that the >compressor didn't turn on. Checked the forums and found out to jumper >the low pressure switch. I was pleased to note that the compressor >runs. However, when I connected the 134a coolant, expecting it to suck >it up the gas, it once again did not seem to want to accept gas. Is >there another valve that I need to open? Does anyone have any >suggestions for how to trouble shoot this? I figure that I would just >waste cans if I had a leak. That is why I think this behavior is kind >of odd. I'm probably missing something easy here. > >Thanks for your help. > >Best, >Breton If you want to do this yourself properly I suggest you borrow, rent or buy a set of gauges for R134 systems ans see what pressures you actually have when compressor is running. ----------------- TheSnoMan.com |
Re: AC Charge 134a on a 93 cherokee sport
On 7 May 2007 10:20:38 -0700, breton <bretonh@gmail.com> wrote:
>Hi All, > >I bought a 93 cherokee sport a half year ago and the guy told me the >ac does not work. I checked the repair records and saw a r134a >conversion and charge by a professional in 2004. I tried charging it >myself today. I located the low pressure port (bottom one on the back >of the compressor with blue cap). First the system wouldn't except any >gas, it just made the dial on the can of coolant shoot up and then the >connector would hiss off when I removed it. Hmmmm, noticed that the >compressor didn't turn on. Checked the forums and found out to jumper >the low pressure switch. I was pleased to note that the compressor >runs. However, when I connected the 134a coolant, expecting it to suck >it up the gas, it once again did not seem to want to accept gas. Is >there another valve that I need to open? Does anyone have any >suggestions for how to trouble shoot this? I figure that I would just >waste cans if I had a leak. That is why I think this behavior is kind >of odd. I'm probably missing something easy here. > >Thanks for your help. > >Best, >Breton If you want to do this yourself properly I suggest you borrow, rent or buy a set of gauges for R134 systems ans see what pressures you actually have when compressor is running. ----------------- TheSnoMan.com |
Re: AC Charge 134a on a 93 cherokee sport
On 7 May 2007 10:20:38 -0700, breton <bretonh@gmail.com> wrote:
>Hi All, > >I bought a 93 cherokee sport a half year ago and the guy told me the >ac does not work. I checked the repair records and saw a r134a >conversion and charge by a professional in 2004. I tried charging it >myself today. I located the low pressure port (bottom one on the back >of the compressor with blue cap). First the system wouldn't except any >gas, it just made the dial on the can of coolant shoot up and then the >connector would hiss off when I removed it. Hmmmm, noticed that the >compressor didn't turn on. Checked the forums and found out to jumper >the low pressure switch. I was pleased to note that the compressor >runs. However, when I connected the 134a coolant, expecting it to suck >it up the gas, it once again did not seem to want to accept gas. Is >there another valve that I need to open? Does anyone have any >suggestions for how to trouble shoot this? I figure that I would just >waste cans if I had a leak. That is why I think this behavior is kind >of odd. I'm probably missing something easy here. > >Thanks for your help. > >Best, >Breton If you want to do this yourself properly I suggest you borrow, rent or buy a set of gauges for R134 systems ans see what pressures you actually have when compressor is running. ----------------- TheSnoMan.com |
Re: AC Charge 134a on a 93 cherokee sport
I am thinking that the Schraeder valve in your low side coupler is worn or
broken. I assume that you have one of those Autozone or similar "recharge kits" with a low side coupler, a gauge and a combination can tap needle valve. Correct me if I am wrong. With the valve off, you should be able to connect to the low side coupler and read some pressure, unless it is completely discharged. Now with the needle valve can taps, it is necessary to screw the handle in to pierce the can, and then screw it out to release the refrigerant into the system. Are you doing this? In Usenet, it is necessary to ask, so don't take this personal. If you have low pressure then you definitely have a leak in your system. The problem I ran into in my Suburban is that AC repair jockeys would find one leak, say, "That's it", and leave the rest of the leaks for the next repair jockey to find. After paying for AC service two or three seasons in a row, I got wise, bought my own gauges, replaced all the O-rings in the system and the rear AC hoses that were actually leaking, and it is still working after four seasons of moderate to heavy use. Earle "breton" <bretonh@gmail.com> wrote in message news:1178558438.735906.31400@w5g2000hsg.googlegrou ps.com... > Hi All, > > I bought a 93 cherokee sport a half year ago and the guy told me the > ac does not work. I checked the repair records and saw a r134a > conversion and charge by a professional in 2004. I tried charging it > myself today. I located the low pressure port (bottom one on the back > of the compressor with blue cap). First the system wouldn't except any > gas, it just made the dial on the can of coolant shoot up and then the > connector would hiss off when I removed it. Hmmmm, noticed that the > compressor didn't turn on. Checked the forums and found out to jumper > the low pressure switch. I was pleased to note that the compressor > runs. However, when I connected the 134a coolant, expecting it to suck > it up the gas, it once again did not seem to want to accept gas. Is > there another valve that I need to open? Does anyone have any > suggestions for how to trouble shoot this? I figure that I would just > waste cans if I had a leak. That is why I think this behavior is kind > of odd. I'm probably missing something easy here. > > Thanks for your help. > > Best, > Breton > |
Re: AC Charge 134a on a 93 cherokee sport
I am thinking that the Schraeder valve in your low side coupler is worn or
broken. I assume that you have one of those Autozone or similar "recharge kits" with a low side coupler, a gauge and a combination can tap needle valve. Correct me if I am wrong. With the valve off, you should be able to connect to the low side coupler and read some pressure, unless it is completely discharged. Now with the needle valve can taps, it is necessary to screw the handle in to pierce the can, and then screw it out to release the refrigerant into the system. Are you doing this? In Usenet, it is necessary to ask, so don't take this personal. If you have low pressure then you definitely have a leak in your system. The problem I ran into in my Suburban is that AC repair jockeys would find one leak, say, "That's it", and leave the rest of the leaks for the next repair jockey to find. After paying for AC service two or three seasons in a row, I got wise, bought my own gauges, replaced all the O-rings in the system and the rear AC hoses that were actually leaking, and it is still working after four seasons of moderate to heavy use. Earle "breton" <bretonh@gmail.com> wrote in message news:1178558438.735906.31400@w5g2000hsg.googlegrou ps.com... > Hi All, > > I bought a 93 cherokee sport a half year ago and the guy told me the > ac does not work. I checked the repair records and saw a r134a > conversion and charge by a professional in 2004. I tried charging it > myself today. I located the low pressure port (bottom one on the back > of the compressor with blue cap). First the system wouldn't except any > gas, it just made the dial on the can of coolant shoot up and then the > connector would hiss off when I removed it. Hmmmm, noticed that the > compressor didn't turn on. Checked the forums and found out to jumper > the low pressure switch. I was pleased to note that the compressor > runs. However, when I connected the 134a coolant, expecting it to suck > it up the gas, it once again did not seem to want to accept gas. Is > there another valve that I need to open? Does anyone have any > suggestions for how to trouble shoot this? I figure that I would just > waste cans if I had a leak. That is why I think this behavior is kind > of odd. I'm probably missing something easy here. > > Thanks for your help. > > Best, > Breton > |
Re: AC Charge 134a on a 93 cherokee sport
I am thinking that the Schraeder valve in your low side coupler is worn or
broken. I assume that you have one of those Autozone or similar "recharge kits" with a low side coupler, a gauge and a combination can tap needle valve. Correct me if I am wrong. With the valve off, you should be able to connect to the low side coupler and read some pressure, unless it is completely discharged. Now with the needle valve can taps, it is necessary to screw the handle in to pierce the can, and then screw it out to release the refrigerant into the system. Are you doing this? In Usenet, it is necessary to ask, so don't take this personal. If you have low pressure then you definitely have a leak in your system. The problem I ran into in my Suburban is that AC repair jockeys would find one leak, say, "That's it", and leave the rest of the leaks for the next repair jockey to find. After paying for AC service two or three seasons in a row, I got wise, bought my own gauges, replaced all the O-rings in the system and the rear AC hoses that were actually leaking, and it is still working after four seasons of moderate to heavy use. Earle "breton" <bretonh@gmail.com> wrote in message news:1178558438.735906.31400@w5g2000hsg.googlegrou ps.com... > Hi All, > > I bought a 93 cherokee sport a half year ago and the guy told me the > ac does not work. I checked the repair records and saw a r134a > conversion and charge by a professional in 2004. I tried charging it > myself today. I located the low pressure port (bottom one on the back > of the compressor with blue cap). First the system wouldn't except any > gas, it just made the dial on the can of coolant shoot up and then the > connector would hiss off when I removed it. Hmmmm, noticed that the > compressor didn't turn on. Checked the forums and found out to jumper > the low pressure switch. I was pleased to note that the compressor > runs. However, when I connected the 134a coolant, expecting it to suck > it up the gas, it once again did not seem to want to accept gas. Is > there another valve that I need to open? Does anyone have any > suggestions for how to trouble shoot this? I figure that I would just > waste cans if I had a leak. That is why I think this behavior is kind > of odd. I'm probably missing something easy here. > > Thanks for your help. > > Best, > Breton > |
Re: AC Charge 134a on a 93 cherokee sport
I am thinking that the Schraeder valve in your low side coupler is worn or
broken. I assume that you have one of those Autozone or similar "recharge kits" with a low side coupler, a gauge and a combination can tap needle valve. Correct me if I am wrong. With the valve off, you should be able to connect to the low side coupler and read some pressure, unless it is completely discharged. Now with the needle valve can taps, it is necessary to screw the handle in to pierce the can, and then screw it out to release the refrigerant into the system. Are you doing this? In Usenet, it is necessary to ask, so don't take this personal. If you have low pressure then you definitely have a leak in your system. The problem I ran into in my Suburban is that AC repair jockeys would find one leak, say, "That's it", and leave the rest of the leaks for the next repair jockey to find. After paying for AC service two or three seasons in a row, I got wise, bought my own gauges, replaced all the O-rings in the system and the rear AC hoses that were actually leaking, and it is still working after four seasons of moderate to heavy use. Earle "breton" <bretonh@gmail.com> wrote in message news:1178558438.735906.31400@w5g2000hsg.googlegrou ps.com... > Hi All, > > I bought a 93 cherokee sport a half year ago and the guy told me the > ac does not work. I checked the repair records and saw a r134a > conversion and charge by a professional in 2004. I tried charging it > myself today. I located the low pressure port (bottom one on the back > of the compressor with blue cap). First the system wouldn't except any > gas, it just made the dial on the can of coolant shoot up and then the > connector would hiss off when I removed it. Hmmmm, noticed that the > compressor didn't turn on. Checked the forums and found out to jumper > the low pressure switch. I was pleased to note that the compressor > runs. However, when I connected the 134a coolant, expecting it to suck > it up the gas, it once again did not seem to want to accept gas. Is > there another valve that I need to open? Does anyone have any > suggestions for how to trouble shoot this? I figure that I would just > waste cans if I had a leak. That is why I think this behavior is kind > of odd. I'm probably missing something easy here. > > Thanks for your help. > > Best, > Breton > |
Re: AC Charge 134a on a 93 cherokee sport
breton wrote:
> Hi All, > > I bought a 93 cherokee sport a half year ago and the guy told me the > ac does not work. I checked the repair records and saw a r134a > conversion and charge by a professional in 2004. I tried charging it > myself today. I located the low pressure port (bottom one on the back > of the compressor with blue cap). First the system wouldn't except any > gas, it just made the dial on the can of coolant shoot up.. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ STOP right there! You used the high side port. The connector off the compressor is the high-side no matter what the cap color is. The low side is between the condenser and the evaporator. The smallest line in the system that runs from the firewall. What bugs me is the connector should not have fit unless the shop that did the mod buggered something up. -- DougW |
Re: AC Charge 134a on a 93 cherokee sport
breton wrote:
> Hi All, > > I bought a 93 cherokee sport a half year ago and the guy told me the > ac does not work. I checked the repair records and saw a r134a > conversion and charge by a professional in 2004. I tried charging it > myself today. I located the low pressure port (bottom one on the back > of the compressor with blue cap). First the system wouldn't except any > gas, it just made the dial on the can of coolant shoot up.. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ STOP right there! You used the high side port. The connector off the compressor is the high-side no matter what the cap color is. The low side is between the condenser and the evaporator. The smallest line in the system that runs from the firewall. What bugs me is the connector should not have fit unless the shop that did the mod buggered something up. -- DougW |
Re: AC Charge 134a on a 93 cherokee sport
breton wrote:
> Hi All, > > I bought a 93 cherokee sport a half year ago and the guy told me the > ac does not work. I checked the repair records and saw a r134a > conversion and charge by a professional in 2004. I tried charging it > myself today. I located the low pressure port (bottom one on the back > of the compressor with blue cap). First the system wouldn't except any > gas, it just made the dial on the can of coolant shoot up.. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ STOP right there! You used the high side port. The connector off the compressor is the high-side no matter what the cap color is. The low side is between the condenser and the evaporator. The smallest line in the system that runs from the firewall. What bugs me is the connector should not have fit unless the shop that did the mod buggered something up. -- DougW |
Re: AC Charge 134a on a 93 cherokee sport
breton wrote:
> Hi All, > > I bought a 93 cherokee sport a half year ago and the guy told me the > ac does not work. I checked the repair records and saw a r134a > conversion and charge by a professional in 2004. I tried charging it > myself today. I located the low pressure port (bottom one on the back > of the compressor with blue cap). First the system wouldn't except any > gas, it just made the dial on the can of coolant shoot up.. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ STOP right there! You used the high side port. The connector off the compressor is the high-side no matter what the cap color is. The low side is between the condenser and the evaporator. The smallest line in the system that runs from the firewall. What bugs me is the connector should not have fit unless the shop that did the mod buggered something up. -- DougW |
Re: AC Charge 134a on a 93 cherokee sport
> You used the high side port. The connector off the compressor is > the high-side no matter what the cap color is. > > The low side is between the condenser and the evaporator. The > smallest line in the system that runs from the firewall. > If it's a Sanden compressor, it can have the low side port on the compressor, or even both low and high side ports on the compressor. Also, the smaller of the two lines, is always the high pressure side. The low pressure line is always the larger diameter line. Spdloader |
Re: AC Charge 134a on a 93 cherokee sport
> You used the high side port. The connector off the compressor is > the high-side no matter what the cap color is. > > The low side is between the condenser and the evaporator. The > smallest line in the system that runs from the firewall. > If it's a Sanden compressor, it can have the low side port on the compressor, or even both low and high side ports on the compressor. Also, the smaller of the two lines, is always the high pressure side. The low pressure line is always the larger diameter line. Spdloader |
Re: AC Charge 134a on a 93 cherokee sport
> You used the high side port. The connector off the compressor is > the high-side no matter what the cap color is. > > The low side is between the condenser and the evaporator. The > smallest line in the system that runs from the firewall. > If it's a Sanden compressor, it can have the low side port on the compressor, or even both low and high side ports on the compressor. Also, the smaller of the two lines, is always the high pressure side. The low pressure line is always the larger diameter line. Spdloader |
Re: AC Charge 134a on a 93 cherokee sport
> You used the high side port. The connector off the compressor is > the high-side no matter what the cap color is. > > The low side is between the condenser and the evaporator. The > smallest line in the system that runs from the firewall. > If it's a Sanden compressor, it can have the low side port on the compressor, or even both low and high side ports on the compressor. Also, the smaller of the two lines, is always the high pressure side. The low pressure line is always the larger diameter line. Spdloader |
Re: AC Charge 134a on a 93 cherokee sport
On May 7, 6:06 pm, "DougW" <post.repl...@invalid.address> wrote:
> breton wrote: > > Hi All, > > > I bought a 93 cherokee sport a half year ago and the guy told me the > > ac does not work. I checked the repair records and saw a r134a > > conversion and charge by a professional in 2004. I tried charging it > > myself today. I located the low pressure port (bottom one on the back > > of the compressor with blue cap). First the system wouldn't except any > > gas, it just made the dial on the can of coolant shoot up.. > > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ Good call, this makes a lot of sense. I'll give it another look tomorrow. I'm pretty sure what I was attaching it to was a new fitting though (from the retrofit). Best, Breton > > STOP right there! > > You used the high side port. The connector off the compressor is > the high-side no matter what the cap color is. > > The low side is between the condenser and the evaporator. The > smallest line in the system that runs from the firewall. > > What bugs me is the connector should not have fit unless the > shop that did the mod buggered something up. > > -- > DougW |
Re: AC Charge 134a on a 93 cherokee sport
On May 7, 6:06 pm, "DougW" <post.repl...@invalid.address> wrote:
> breton wrote: > > Hi All, > > > I bought a 93 cherokee sport a half year ago and the guy told me the > > ac does not work. I checked the repair records and saw a r134a > > conversion and charge by a professional in 2004. I tried charging it > > myself today. I located the low pressure port (bottom one on the back > > of the compressor with blue cap). First the system wouldn't except any > > gas, it just made the dial on the can of coolant shoot up.. > > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ Good call, this makes a lot of sense. I'll give it another look tomorrow. I'm pretty sure what I was attaching it to was a new fitting though (from the retrofit). Best, Breton > > STOP right there! > > You used the high side port. The connector off the compressor is > the high-side no matter what the cap color is. > > The low side is between the condenser and the evaporator. The > smallest line in the system that runs from the firewall. > > What bugs me is the connector should not have fit unless the > shop that did the mod buggered something up. > > -- > DougW |
Re: AC Charge 134a on a 93 cherokee sport
On May 7, 6:06 pm, "DougW" <post.repl...@invalid.address> wrote:
> breton wrote: > > Hi All, > > > I bought a 93 cherokee sport a half year ago and the guy told me the > > ac does not work. I checked the repair records and saw a r134a > > conversion and charge by a professional in 2004. I tried charging it > > myself today. I located the low pressure port (bottom one on the back > > of the compressor with blue cap). First the system wouldn't except any > > gas, it just made the dial on the can of coolant shoot up.. > > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ Good call, this makes a lot of sense. I'll give it another look tomorrow. I'm pretty sure what I was attaching it to was a new fitting though (from the retrofit). Best, Breton > > STOP right there! > > You used the high side port. The connector off the compressor is > the high-side no matter what the cap color is. > > The low side is between the condenser and the evaporator. The > smallest line in the system that runs from the firewall. > > What bugs me is the connector should not have fit unless the > shop that did the mod buggered something up. > > -- > DougW |
Re: AC Charge 134a on a 93 cherokee sport
On May 7, 6:06 pm, "DougW" <post.repl...@invalid.address> wrote:
> breton wrote: > > Hi All, > > > I bought a 93 cherokee sport a half year ago and the guy told me the > > ac does not work. I checked the repair records and saw a r134a > > conversion and charge by a professional in 2004. I tried charging it > > myself today. I located the low pressure port (bottom one on the back > > of the compressor with blue cap). First the system wouldn't except any > > gas, it just made the dial on the can of coolant shoot up.. > > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ Good call, this makes a lot of sense. I'll give it another look tomorrow. I'm pretty sure what I was attaching it to was a new fitting though (from the retrofit). Best, Breton > > STOP right there! > > You used the high side port. The connector off the compressor is > the high-side no matter what the cap color is. > > The low side is between the condenser and the evaporator. The > smallest line in the system that runs from the firewall. > > What bugs me is the connector should not have fit unless the > shop that did the mod buggered something up. > > -- > DougW |
Re: AC Charge 134a on a 93 cherokee sport
breton wrote:
> "DougW" wrote: >> breton wrote: >>> Hi All, >> >>> I bought a 93 cherokee sport a half year ago and the guy told me the >>> ac does not work. I checked the repair records and saw a r134a >>> conversion and charge by a professional in 2004. I tried charging it >>> myself today. I located the low pressure port (bottom one on the >>> back of the compressor with blue cap). First the system wouldn't >>> except any gas, it just made the dial on the can of coolant shoot >>> up.. >> >> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ > Good call, this makes a lot of sense. I'll give it another look > tomorrow. I'm pretty sure what I was attaching it to was a new fitting > though (from the retrofit). Hold on a sec, I boned my description. ..->Evaporator=>accumulator=>compressor-(highside port)->condenser->charge port. |_________________________________________________ ____________________________| - is skinny pipe, = is fat hose/pipe They also come like this http://www.familycar.com/ac1.htm Since someone upgraded your system I'd take it to a qualified shop to point out where the correct ports are. Like Spdloader pointed out, you might have the correct port for the compressor that was installed. But with a pegged gauge I'd be suspicious. One thing for certain is you don't want to fill liquid in before the pump or it will die a horrible death, same as an engine with water in the pistons. The other thing is to get the can to fill properly you need to have the compressor running full tilt. That's done by turning on the AC full, recirc, and if the pressure is so low it won't kick on then you need to short the lowside cutoff switch located on the accumulator. http://revbeergoggles.com/Fixes/sens...essure-low.jpg FYI for the ZJ http://revbeergoggles.com/Fixes/sens...ssure-high.jpg And the fill port is by the overflow bottle. http://revbeergoggles.com/temp/sensor-coolant.jpg On my system you fill liquid in that port with the compressor running. -- DougW |
Re: AC Charge 134a on a 93 cherokee sport
breton wrote:
> "DougW" wrote: >> breton wrote: >>> Hi All, >> >>> I bought a 93 cherokee sport a half year ago and the guy told me the >>> ac does not work. I checked the repair records and saw a r134a >>> conversion and charge by a professional in 2004. I tried charging it >>> myself today. I located the low pressure port (bottom one on the >>> back of the compressor with blue cap). First the system wouldn't >>> except any gas, it just made the dial on the can of coolant shoot >>> up.. >> >> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ > Good call, this makes a lot of sense. I'll give it another look > tomorrow. I'm pretty sure what I was attaching it to was a new fitting > though (from the retrofit). Hold on a sec, I boned my description. ..->Evaporator=>accumulator=>compressor-(highside port)->condenser->charge port. |_________________________________________________ ____________________________| - is skinny pipe, = is fat hose/pipe They also come like this http://www.familycar.com/ac1.htm Since someone upgraded your system I'd take it to a qualified shop to point out where the correct ports are. Like Spdloader pointed out, you might have the correct port for the compressor that was installed. But with a pegged gauge I'd be suspicious. One thing for certain is you don't want to fill liquid in before the pump or it will die a horrible death, same as an engine with water in the pistons. The other thing is to get the can to fill properly you need to have the compressor running full tilt. That's done by turning on the AC full, recirc, and if the pressure is so low it won't kick on then you need to short the lowside cutoff switch located on the accumulator. http://revbeergoggles.com/Fixes/sens...essure-low.jpg FYI for the ZJ http://revbeergoggles.com/Fixes/sens...ssure-high.jpg And the fill port is by the overflow bottle. http://revbeergoggles.com/temp/sensor-coolant.jpg On my system you fill liquid in that port with the compressor running. -- DougW |
Re: AC Charge 134a on a 93 cherokee sport
breton wrote:
> "DougW" wrote: >> breton wrote: >>> Hi All, >> >>> I bought a 93 cherokee sport a half year ago and the guy told me the >>> ac does not work. I checked the repair records and saw a r134a >>> conversion and charge by a professional in 2004. I tried charging it >>> myself today. I located the low pressure port (bottom one on the >>> back of the compressor with blue cap). First the system wouldn't >>> except any gas, it just made the dial on the can of coolant shoot >>> up.. >> >> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ > Good call, this makes a lot of sense. I'll give it another look > tomorrow. I'm pretty sure what I was attaching it to was a new fitting > though (from the retrofit). Hold on a sec, I boned my description. ..->Evaporator=>accumulator=>compressor-(highside port)->condenser->charge port. |_________________________________________________ ____________________________| - is skinny pipe, = is fat hose/pipe They also come like this http://www.familycar.com/ac1.htm Since someone upgraded your system I'd take it to a qualified shop to point out where the correct ports are. Like Spdloader pointed out, you might have the correct port for the compressor that was installed. But with a pegged gauge I'd be suspicious. One thing for certain is you don't want to fill liquid in before the pump or it will die a horrible death, same as an engine with water in the pistons. The other thing is to get the can to fill properly you need to have the compressor running full tilt. That's done by turning on the AC full, recirc, and if the pressure is so low it won't kick on then you need to short the lowside cutoff switch located on the accumulator. http://revbeergoggles.com/Fixes/sens...essure-low.jpg FYI for the ZJ http://revbeergoggles.com/Fixes/sens...ssure-high.jpg And the fill port is by the overflow bottle. http://revbeergoggles.com/temp/sensor-coolant.jpg On my system you fill liquid in that port with the compressor running. -- DougW |
Re: AC Charge 134a on a 93 cherokee sport
breton wrote:
> "DougW" wrote: >> breton wrote: >>> Hi All, >> >>> I bought a 93 cherokee sport a half year ago and the guy told me the >>> ac does not work. I checked the repair records and saw a r134a >>> conversion and charge by a professional in 2004. I tried charging it >>> myself today. I located the low pressure port (bottom one on the >>> back of the compressor with blue cap). First the system wouldn't >>> except any gas, it just made the dial on the can of coolant shoot >>> up.. >> >> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ > Good call, this makes a lot of sense. I'll give it another look > tomorrow. I'm pretty sure what I was attaching it to was a new fitting > though (from the retrofit). Hold on a sec, I boned my description. ..->Evaporator=>accumulator=>compressor-(highside port)->condenser->charge port. |_________________________________________________ ____________________________| - is skinny pipe, = is fat hose/pipe They also come like this http://www.familycar.com/ac1.htm Since someone upgraded your system I'd take it to a qualified shop to point out where the correct ports are. Like Spdloader pointed out, you might have the correct port for the compressor that was installed. But with a pegged gauge I'd be suspicious. One thing for certain is you don't want to fill liquid in before the pump or it will die a horrible death, same as an engine with water in the pistons. The other thing is to get the can to fill properly you need to have the compressor running full tilt. That's done by turning on the AC full, recirc, and if the pressure is so low it won't kick on then you need to short the lowside cutoff switch located on the accumulator. http://revbeergoggles.com/Fixes/sens...essure-low.jpg FYI for the ZJ http://revbeergoggles.com/Fixes/sens...ssure-high.jpg And the fill port is by the overflow bottle. http://revbeergoggles.com/temp/sensor-coolant.jpg On my system you fill liquid in that port with the compressor running. -- DougW |
Re: AC Charge 134a on a 93 cherokee sport
Spdloader wrote:
>> You used the high side port. The connector off the compressor is >> the high-side no matter what the cap color is. >> >> The low side is between the condenser and the evaporator. The >> smallest line in the system that runs from the firewall. >> > > If it's a Sanden compressor, it can have the low side port on the > compressor, or even both low and high side ports on the compressor. > > Also, the smaller of the two lines, is always the high pressure side. > > The low pressure line is always the larger diameter line. I boned that description in so many ways it's not even funny. :/ All the vehicles I've ever worked on you filled in the skinny side and stayed away from the compressor port. -- DougW |
Re: AC Charge 134a on a 93 cherokee sport
Spdloader wrote:
>> You used the high side port. The connector off the compressor is >> the high-side no matter what the cap color is. >> >> The low side is between the condenser and the evaporator. The >> smallest line in the system that runs from the firewall. >> > > If it's a Sanden compressor, it can have the low side port on the > compressor, or even both low and high side ports on the compressor. > > Also, the smaller of the two lines, is always the high pressure side. > > The low pressure line is always the larger diameter line. I boned that description in so many ways it's not even funny. :/ All the vehicles I've ever worked on you filled in the skinny side and stayed away from the compressor port. -- DougW |
Re: AC Charge 134a on a 93 cherokee sport
Spdloader wrote:
>> You used the high side port. The connector off the compressor is >> the high-side no matter what the cap color is. >> >> The low side is between the condenser and the evaporator. The >> smallest line in the system that runs from the firewall. >> > > If it's a Sanden compressor, it can have the low side port on the > compressor, or even both low and high side ports on the compressor. > > Also, the smaller of the two lines, is always the high pressure side. > > The low pressure line is always the larger diameter line. I boned that description in so many ways it's not even funny. :/ All the vehicles I've ever worked on you filled in the skinny side and stayed away from the compressor port. -- DougW |
Re: AC Charge 134a on a 93 cherokee sport
Spdloader wrote:
>> You used the high side port. The connector off the compressor is >> the high-side no matter what the cap color is. >> >> The low side is between the condenser and the evaporator. The >> smallest line in the system that runs from the firewall. >> > > If it's a Sanden compressor, it can have the low side port on the > compressor, or even both low and high side ports on the compressor. > > Also, the smaller of the two lines, is always the high pressure side. > > The low pressure line is always the larger diameter line. I boned that description in so many ways it's not even funny. :/ All the vehicles I've ever worked on you filled in the skinny side and stayed away from the compressor port. -- DougW |
Re: AC Charge 134a on a 93 cherokee sport
And my instructor told me the can would explode, blowing out one of my
frozen eye balls, that would break into a zillion pieces as it hit the floor. God Bless America, Bill O|||||||O mailto:-------------------- http://www.----------.com/ "DougW" <post.replies@invalid.address> wrote in message news:rpN%h.160774$nh4.18954@newsfe20.lga > > STOP right there! > > You used the high side port. The connector off the compressor is > the high-side no matter what the cap color is. > > The low side is between the condenser and the evaporator. The > smallest line in the system that runs from the firewall. > > What bugs me is the connector should not have fit unless the > shop that did the mod buggered something up. > > -- > DougW > > -- Posted via a free Usenet account from http://www.teranews.com |
Re: AC Charge 134a on a 93 cherokee sport
And my instructor told me the can would explode, blowing out one of my
frozen eye balls, that would break into a zillion pieces as it hit the floor. God Bless America, Bill O|||||||O mailto:-------------------- http://www.----------.com/ "DougW" <post.replies@invalid.address> wrote in message news:rpN%h.160774$nh4.18954@newsfe20.lga > > STOP right there! > > You used the high side port. The connector off the compressor is > the high-side no matter what the cap color is. > > The low side is between the condenser and the evaporator. The > smallest line in the system that runs from the firewall. > > What bugs me is the connector should not have fit unless the > shop that did the mod buggered something up. > > -- > DougW > > -- Posted via a free Usenet account from http://www.teranews.com |
Re: AC Charge 134a on a 93 cherokee sport
And my instructor told me the can would explode, blowing out one of my
frozen eye balls, that would break into a zillion pieces as it hit the floor. God Bless America, Bill O|||||||O mailto:-------------------- http://www.----------.com/ "DougW" <post.replies@invalid.address> wrote in message news:rpN%h.160774$nh4.18954@newsfe20.lga > > STOP right there! > > You used the high side port. The connector off the compressor is > the high-side no matter what the cap color is. > > The low side is between the condenser and the evaporator. The > smallest line in the system that runs from the firewall. > > What bugs me is the connector should not have fit unless the > shop that did the mod buggered something up. > > -- > DougW > > -- Posted via a free Usenet account from http://www.teranews.com |
Re: AC Charge 134a on a 93 cherokee sport
And my instructor told me the can would explode, blowing out one of my
frozen eye balls, that would break into a zillion pieces as it hit the floor. God Bless America, Bill O|||||||O mailto:-------------------- http://www.----------.com/ "DougW" <post.replies@invalid.address> wrote in message news:rpN%h.160774$nh4.18954@newsfe20.lga > > STOP right there! > > You used the high side port. The connector off the compressor is > the high-side no matter what the cap color is. > > The low side is between the condenser and the evaporator. The > smallest line in the system that runs from the firewall. > > What bugs me is the connector should not have fit unless the > shop that did the mod buggered something up. > > -- > DougW > > -- Posted via a free Usenet account from http://www.teranews.com |
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