Need help recharging the AC on a 97 Jeep Cherokee Sport
08-14-2005, 05:07 PM
#21
Guest
Posts: n/a
Re: Need help recharging the AC on a 97 Jeep Cherokee Sport
The system is automatically off via the low pressures switch.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Coasty wrote:
>
> Not a good method to use! Each manufacturer has a specific amount of
> refrigerant they require to be installed by weight. You do this with the
> system off and measure by the total refrigerant installed. Once you have
> the correct amount installed you need to check the super heat combined with
> discharge air temp, ambient air temp and the high and low side based on the
> temperature chart anything else is just a SWAG and not contusive to a good
> installation. Also in a new or rebuilt system you need to draw a 500 micron
> vacuum to get all the bad stuff out and re introduce the correct amount of
> compressor oil.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Coasty wrote:
>
> Not a good method to use! Each manufacturer has a specific amount of
> refrigerant they require to be installed by weight. You do this with the
> system off and measure by the total refrigerant installed. Once you have
> the correct amount installed you need to check the super heat combined with
> discharge air temp, ambient air temp and the high and low side based on the
> temperature chart anything else is just a SWAG and not contusive to a good
> installation. Also in a new or rebuilt system you need to draw a 500 micron
> vacuum to get all the bad stuff out and re introduce the correct amount of
> compressor oil.
08-14-2005, 06:28 PM
#22
Guest
Posts: n/a
Re: Need help recharging the AC on a 97 Jeep Cherokee Sport
I have NEVER been able to recharge a system completely without the compressor
running.........and Bill is right, the compressor is off via the low pressure
switch, until some gas is introduced, and brings the pressure up, then the
compressor aids in pulling the refrigerant into the system via the suctions
side of the compressor. And, I would NEVER add any extra oil to the system
on a recharge, unless you KNEW you lost a significant amount of oil.....
You'll end up slugging your compressor with liquid oil.....
L.W.(ßill) ------ III wrote:
> The system is automatically off via the low pressures switch.
> God Bless America, ßill O|||||||O
>mailto:-------------------- http://www.----------.com/
>
>> Not a good method to use! Each manufacturer has a specific amount of
>> refrigerant they require to be installed by weight. You do this with the
>[quoted text clipped - 5 lines]
>> vacuum to get all the bad stuff out and re introduce the correct amount of
>> compressor oil.
--
Message posted via http://www.carkb.com
running.........and Bill is right, the compressor is off via the low pressure
switch, until some gas is introduced, and brings the pressure up, then the
compressor aids in pulling the refrigerant into the system via the suctions
side of the compressor. And, I would NEVER add any extra oil to the system
on a recharge, unless you KNEW you lost a significant amount of oil.....
You'll end up slugging your compressor with liquid oil.....
L.W.(ßill) ------ III wrote:
> The system is automatically off via the low pressures switch.
> God Bless America, ßill O|||||||O
>mailto:-------------------- http://www.----------.com/
>
>> Not a good method to use! Each manufacturer has a specific amount of
>> refrigerant they require to be installed by weight. You do this with the
>[quoted text clipped - 5 lines]
>> vacuum to get all the bad stuff out and re introduce the correct amount of
>> compressor oil.
--
Message posted via http://www.carkb.com
08-14-2005, 06:28 PM
#23
Guest
Posts: n/a
Re: Need help recharging the AC on a 97 Jeep Cherokee Sport
I have NEVER been able to recharge a system completely without the compressor
running.........and Bill is right, the compressor is off via the low pressure
switch, until some gas is introduced, and brings the pressure up, then the
compressor aids in pulling the refrigerant into the system via the suctions
side of the compressor. And, I would NEVER add any extra oil to the system
on a recharge, unless you KNEW you lost a significant amount of oil.....
You'll end up slugging your compressor with liquid oil.....
L.W.(ßill) ------ III wrote:
> The system is automatically off via the low pressures switch.
> God Bless America, ßill O|||||||O
>mailto:-------------------- http://www.----------.com/
>
>> Not a good method to use! Each manufacturer has a specific amount of
>> refrigerant they require to be installed by weight. You do this with the
>[quoted text clipped - 5 lines]
>> vacuum to get all the bad stuff out and re introduce the correct amount of
>> compressor oil.
--
Message posted via http://www.carkb.com
running.........and Bill is right, the compressor is off via the low pressure
switch, until some gas is introduced, and brings the pressure up, then the
compressor aids in pulling the refrigerant into the system via the suctions
side of the compressor. And, I would NEVER add any extra oil to the system
on a recharge, unless you KNEW you lost a significant amount of oil.....
You'll end up slugging your compressor with liquid oil.....
L.W.(ßill) ------ III wrote:
> The system is automatically off via the low pressures switch.
> God Bless America, ßill O|||||||O
>mailto:-------------------- http://www.----------.com/
>
>> Not a good method to use! Each manufacturer has a specific amount of
>> refrigerant they require to be installed by weight. You do this with the
>[quoted text clipped - 5 lines]
>> vacuum to get all the bad stuff out and re introduce the correct amount of
>> compressor oil.
--
Message posted via http://www.carkb.com
08-14-2005, 06:28 PM
#24
Guest
Posts: n/a
Re: Need help recharging the AC on a 97 Jeep Cherokee Sport
I have NEVER been able to recharge a system completely without the compressor
running.........and Bill is right, the compressor is off via the low pressure
switch, until some gas is introduced, and brings the pressure up, then the
compressor aids in pulling the refrigerant into the system via the suctions
side of the compressor. And, I would NEVER add any extra oil to the system
on a recharge, unless you KNEW you lost a significant amount of oil.....
You'll end up slugging your compressor with liquid oil.....
L.W.(ßill) ------ III wrote:
> The system is automatically off via the low pressures switch.
> God Bless America, ßill O|||||||O
>mailto:-------------------- http://www.----------.com/
>
>> Not a good method to use! Each manufacturer has a specific amount of
>> refrigerant they require to be installed by weight. You do this with the
>[quoted text clipped - 5 lines]
>> vacuum to get all the bad stuff out and re introduce the correct amount of
>> compressor oil.
--
Message posted via http://www.carkb.com
running.........and Bill is right, the compressor is off via the low pressure
switch, until some gas is introduced, and brings the pressure up, then the
compressor aids in pulling the refrigerant into the system via the suctions
side of the compressor. And, I would NEVER add any extra oil to the system
on a recharge, unless you KNEW you lost a significant amount of oil.....
You'll end up slugging your compressor with liquid oil.....
L.W.(ßill) ------ III wrote:
> The system is automatically off via the low pressures switch.
> God Bless America, ßill O|||||||O
>mailto:-------------------- http://www.----------.com/
>
>> Not a good method to use! Each manufacturer has a specific amount of
>> refrigerant they require to be installed by weight. You do this with the
>[quoted text clipped - 5 lines]
>> vacuum to get all the bad stuff out and re introduce the correct amount of
>> compressor oil.
--
Message posted via http://www.carkb.com
08-14-2005, 06:28 PM
#25
Guest
Posts: n/a
Re: Need help recharging the AC on a 97 Jeep Cherokee Sport
I have NEVER been able to recharge a system completely without the compressor
running.........and Bill is right, the compressor is off via the low pressure
switch, until some gas is introduced, and brings the pressure up, then the
compressor aids in pulling the refrigerant into the system via the suctions
side of the compressor. And, I would NEVER add any extra oil to the system
on a recharge, unless you KNEW you lost a significant amount of oil.....
You'll end up slugging your compressor with liquid oil.....
L.W.(ßill) ------ III wrote:
> The system is automatically off via the low pressures switch.
> God Bless America, ßill O|||||||O
>mailto:-------------------- http://www.----------.com/
>
>> Not a good method to use! Each manufacturer has a specific amount of
>> refrigerant they require to be installed by weight. You do this with the
>[quoted text clipped - 5 lines]
>> vacuum to get all the bad stuff out and re introduce the correct amount of
>> compressor oil.
--
Message posted via http://www.carkb.com
running.........and Bill is right, the compressor is off via the low pressure
switch, until some gas is introduced, and brings the pressure up, then the
compressor aids in pulling the refrigerant into the system via the suctions
side of the compressor. And, I would NEVER add any extra oil to the system
on a recharge, unless you KNEW you lost a significant amount of oil.....
You'll end up slugging your compressor with liquid oil.....
L.W.(ßill) ------ III wrote:
> The system is automatically off via the low pressures switch.
> God Bless America, ßill O|||||||O
>mailto:-------------------- http://www.----------.com/
>
>> Not a good method to use! Each manufacturer has a specific amount of
>> refrigerant they require to be installed by weight. You do this with the
>[quoted text clipped - 5 lines]
>> vacuum to get all the bad stuff out and re introduce the correct amount of
>> compressor oil.
--
Message posted via http://www.carkb.com
08-14-2005, 07:20 PM
#26
Guest
Posts: n/a
Re: Need help recharging the AC on a 97 Jeep Cherokee Sport
Robb S via CarKB.com did pass the time by typing:
> I have NEVER been able to recharge a system completely without the compressor
> running.....
And you never will. That's why the charging instructions always say to have
the AC on max and the low side switch bypassed if required to turn on the compressor.
>....and Bill is right, the compressor is off via the low pressure
> switch, until some gas is introduced, and brings the pressure up, then the
> compressor aids in pulling the refrigerant into the system via the suctions
> side of the compressor.
That's why you bypass the low side switch with a jumper wire when starting
from a low or zero charge.
> And, I would NEVER add any extra oil to the system
> on a recharge, unless you KNEW you lost a significant amount of oil.....
> You'll end up slugging your compressor with liquid oil.....
Agreed. The only time you should add oil is when you replace the accumulator.
There is no easy way of testing oil level.
--
DougW
> I have NEVER been able to recharge a system completely without the compressor
> running.....
And you never will. That's why the charging instructions always say to have
the AC on max and the low side switch bypassed if required to turn on the compressor.
>....and Bill is right, the compressor is off via the low pressure
> switch, until some gas is introduced, and brings the pressure up, then the
> compressor aids in pulling the refrigerant into the system via the suctions
> side of the compressor.
That's why you bypass the low side switch with a jumper wire when starting
from a low or zero charge.
> And, I would NEVER add any extra oil to the system
> on a recharge, unless you KNEW you lost a significant amount of oil.....
> You'll end up slugging your compressor with liquid oil.....
Agreed. The only time you should add oil is when you replace the accumulator.
There is no easy way of testing oil level.
--
DougW
08-14-2005, 07:20 PM
#27
Guest
Posts: n/a
Re: Need help recharging the AC on a 97 Jeep Cherokee Sport
Robb S via CarKB.com did pass the time by typing:
> I have NEVER been able to recharge a system completely without the compressor
> running.....
And you never will. That's why the charging instructions always say to have
the AC on max and the low side switch bypassed if required to turn on the compressor.
>....and Bill is right, the compressor is off via the low pressure
> switch, until some gas is introduced, and brings the pressure up, then the
> compressor aids in pulling the refrigerant into the system via the suctions
> side of the compressor.
That's why you bypass the low side switch with a jumper wire when starting
from a low or zero charge.
> And, I would NEVER add any extra oil to the system
> on a recharge, unless you KNEW you lost a significant amount of oil.....
> You'll end up slugging your compressor with liquid oil.....
Agreed. The only time you should add oil is when you replace the accumulator.
There is no easy way of testing oil level.
--
DougW
> I have NEVER been able to recharge a system completely without the compressor
> running.....
And you never will. That's why the charging instructions always say to have
the AC on max and the low side switch bypassed if required to turn on the compressor.
>....and Bill is right, the compressor is off via the low pressure
> switch, until some gas is introduced, and brings the pressure up, then the
> compressor aids in pulling the refrigerant into the system via the suctions
> side of the compressor.
That's why you bypass the low side switch with a jumper wire when starting
from a low or zero charge.
> And, I would NEVER add any extra oil to the system
> on a recharge, unless you KNEW you lost a significant amount of oil.....
> You'll end up slugging your compressor with liquid oil.....
Agreed. The only time you should add oil is when you replace the accumulator.
There is no easy way of testing oil level.
--
DougW
08-14-2005, 07:20 PM
#28
Guest
Posts: n/a
Re: Need help recharging the AC on a 97 Jeep Cherokee Sport
Robb S via CarKB.com did pass the time by typing:
> I have NEVER been able to recharge a system completely without the compressor
> running.....
And you never will. That's why the charging instructions always say to have
the AC on max and the low side switch bypassed if required to turn on the compressor.
>....and Bill is right, the compressor is off via the low pressure
> switch, until some gas is introduced, and brings the pressure up, then the
> compressor aids in pulling the refrigerant into the system via the suctions
> side of the compressor.
That's why you bypass the low side switch with a jumper wire when starting
from a low or zero charge.
> And, I would NEVER add any extra oil to the system
> on a recharge, unless you KNEW you lost a significant amount of oil.....
> You'll end up slugging your compressor with liquid oil.....
Agreed. The only time you should add oil is when you replace the accumulator.
There is no easy way of testing oil level.
--
DougW
> I have NEVER been able to recharge a system completely without the compressor
> running.....
And you never will. That's why the charging instructions always say to have
the AC on max and the low side switch bypassed if required to turn on the compressor.
>....and Bill is right, the compressor is off via the low pressure
> switch, until some gas is introduced, and brings the pressure up, then the
> compressor aids in pulling the refrigerant into the system via the suctions
> side of the compressor.
That's why you bypass the low side switch with a jumper wire when starting
from a low or zero charge.
> And, I would NEVER add any extra oil to the system
> on a recharge, unless you KNEW you lost a significant amount of oil.....
> You'll end up slugging your compressor with liquid oil.....
Agreed. The only time you should add oil is when you replace the accumulator.
There is no easy way of testing oil level.
--
DougW
08-14-2005, 07:20 PM
#29
Guest
Posts: n/a
Re: Need help recharging the AC on a 97 Jeep Cherokee Sport
Robb S via CarKB.com did pass the time by typing:
> I have NEVER been able to recharge a system completely without the compressor
> running.....
And you never will. That's why the charging instructions always say to have
the AC on max and the low side switch bypassed if required to turn on the compressor.
>....and Bill is right, the compressor is off via the low pressure
> switch, until some gas is introduced, and brings the pressure up, then the
> compressor aids in pulling the refrigerant into the system via the suctions
> side of the compressor.
That's why you bypass the low side switch with a jumper wire when starting
from a low or zero charge.
> And, I would NEVER add any extra oil to the system
> on a recharge, unless you KNEW you lost a significant amount of oil.....
> You'll end up slugging your compressor with liquid oil.....
Agreed. The only time you should add oil is when you replace the accumulator.
There is no easy way of testing oil level.
--
DougW
> I have NEVER been able to recharge a system completely without the compressor
> running.....
And you never will. That's why the charging instructions always say to have
the AC on max and the low side switch bypassed if required to turn on the compressor.
>....and Bill is right, the compressor is off via the low pressure
> switch, until some gas is introduced, and brings the pressure up, then the
> compressor aids in pulling the refrigerant into the system via the suctions
> side of the compressor.
That's why you bypass the low side switch with a jumper wire when starting
from a low or zero charge.
> And, I would NEVER add any extra oil to the system
> on a recharge, unless you KNEW you lost a significant amount of oil.....
> You'll end up slugging your compressor with liquid oil.....
Agreed. The only time you should add oil is when you replace the accumulator.
There is no easy way of testing oil level.
--
DougW
08-14-2005, 11:12 PM
#30
Guest
Posts: n/a
Re: Need help recharging the AC on a 97 Jeep Cherokee Sport
Thanks for the advice fellas. I got a recharge kit and did it this
afternoon. Drove around for a hour and tested it again. Added maybe
4 or 5 more ounces and it is cold as ice.
Those 100 degree days shouldn't have me down now.
Thanks again,
Jeff
On Sun, 14 Aug 2005 18:20:53 -0500, "DougW"
<post.replies@invalid.address> wrote:
>Robb S via CarKB.com did pass the time by typing:
>> I have NEVER been able to recharge a system completely without the compressor
>> running.....
>
>And you never will. That's why the charging instructions always say to have
>the AC on max and the low side switch bypassed if required to turn on the compressor.
>
>>....and Bill is right, the compressor is off via the low pressure
>> switch, until some gas is introduced, and brings the pressure up, then the
>> compressor aids in pulling the refrigerant into the system via the suctions
>> side of the compressor.
>
>That's why you bypass the low side switch with a jumper wire when starting
>from a low or zero charge.
>
>> And, I would NEVER add any extra oil to the system
>> on a recharge, unless you KNEW you lost a significant amount of oil.....
>> You'll end up slugging your compressor with liquid oil.....
>
>Agreed. The only time you should add oil is when you replace the accumulator.
>There is no easy way of testing oil level.
afternoon. Drove around for a hour and tested it again. Added maybe
4 or 5 more ounces and it is cold as ice.
Those 100 degree days shouldn't have me down now.
Thanks again,
Jeff
On Sun, 14 Aug 2005 18:20:53 -0500, "DougW"
<post.replies@invalid.address> wrote:
>Robb S via CarKB.com did pass the time by typing:
>> I have NEVER been able to recharge a system completely without the compressor
>> running.....
>
>And you never will. That's why the charging instructions always say to have
>the AC on max and the low side switch bypassed if required to turn on the compressor.
>
>>....and Bill is right, the compressor is off via the low pressure
>> switch, until some gas is introduced, and brings the pressure up, then the
>> compressor aids in pulling the refrigerant into the system via the suctions
>> side of the compressor.
>
>That's why you bypass the low side switch with a jumper wire when starting
>from a low or zero charge.
>
>> And, I would NEVER add any extra oil to the system
>> on a recharge, unless you KNEW you lost a significant amount of oil.....
>> You'll end up slugging your compressor with liquid oil.....
>
>Agreed. The only time you should add oil is when you replace the accumulator.
>There is no easy way of testing oil level.