Re: Need advice on Cherokee aircon
 

On Mon, 31 May 2004 18:16:01 UTC "Mike"
<mas39spamfreezone@ntlworld.com> wrote:

> The manual I have says basically, anything to do with aircon, take it to a
> specialists, but I thought I would try this group before undergoing open
> wallet surgery. Is there anything else I could reasonably check? I havnt
> managed to find a fuse for this system, but it would be reasonable to assume
> there is one somewhere.
>
> One other thing, the compressor has a label on it that says R134a. Perhaps
> this is the model of compressor.

R134a is the refrigerant, not the model. If this is the extent of
your knowlege, I'd suggest doing without A/C until you either do some
serious studying of A/C manuals - or follow the manual advice and find
someone who knows what they are doing. Mistakes on this are
expensive. As you have expressed a keen interest in you personal body
integrity, you should also know that there are serious risks when
working on A/C units, especially if you don't know what you are doing.

--
Will Honea

Re: Need advice on Cherokee aircon
 

On Mon, 31 May 2004 18:16:01 UTC "Mike"
<mas39spamfreezone@ntlworld.com> wrote:

> The manual I have says basically, anything to do with aircon, take it to a
> specialists, but I thought I would try this group before undergoing open
> wallet surgery. Is there anything else I could reasonably check? I havnt
> managed to find a fuse for this system, but it would be reasonable to assume
> there is one somewhere.
>
> One other thing, the compressor has a label on it that says R134a. Perhaps
> this is the model of compressor.

R134a is the refrigerant, not the model. If this is the extent of
your knowlege, I'd suggest doing without A/C until you either do some
serious studying of A/C manuals - or follow the manual advice and find
someone who knows what they are doing. Mistakes on this are
expensive. As you have expressed a keen interest in you personal body
integrity, you should also know that there are serious risks when
working on A/C units, especially if you don't know what you are doing.

--
Will Honea

Re: Need advice on Cherokee aircon
 

On Mon, 31 May 2004 18:16:01 UTC "Mike"
<mas39spamfreezone@ntlworld.com> wrote:

> The manual I have says basically, anything to do with aircon, take it to a
> specialists, but I thought I would try this group before undergoing open
> wallet surgery. Is there anything else I could reasonably check? I havnt
> managed to find a fuse for this system, but it would be reasonable to assume
> there is one somewhere.
>
> One other thing, the compressor has a label on it that says R134a. Perhaps
> this is the model of compressor.

R134a is the refrigerant, not the model. If this is the extent of
your knowlege, I'd suggest doing without A/C until you either do some
serious studying of A/C manuals - or follow the manual advice and find
someone who knows what they are doing. Mistakes on this are
expensive. As you have expressed a keen interest in you personal body
integrity, you should also know that there are serious risks when
working on A/C units, especially if you don't know what you are doing.

--
Will Honea

Re: Need advice on Cherokee aircon
 

Ditto.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Will Honea wrote:
>
> R134a is the refrigerant, not the model. If this is the extent of
> your knowlege, I'd suggest doing without A/C until you either do some
> serious studying of A/C manuals - or follow the manual advice and find
> someone who knows what they are doing. Mistakes on this are
> expensive. As you have expressed a keen interest in you personal body
> integrity, you should also know that there are serious risks when
> working on A/C units, especially if you don't know what you are doing.
>
> --
> Will Honea

Re: Need advice on Cherokee aircon
 

Ditto.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Will Honea wrote:
>
> R134a is the refrigerant, not the model. If this is the extent of
> your knowlege, I'd suggest doing without A/C until you either do some
> serious studying of A/C manuals - or follow the manual advice and find
> someone who knows what they are doing. Mistakes on this are
> expensive. As you have expressed a keen interest in you personal body
> integrity, you should also know that there are serious risks when
> working on A/C units, especially if you don't know what you are doing.
>
> --
> Will Honea

Re: Need advice on Cherokee aircon
 

Ditto.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Will Honea wrote:
>
> R134a is the refrigerant, not the model. If this is the extent of
> your knowlege, I'd suggest doing without A/C until you either do some
> serious studying of A/C manuals - or follow the manual advice and find
> someone who knows what they are doing. Mistakes on this are
> expensive. As you have expressed a keen interest in you personal body
> integrity, you should also know that there are serious risks when
> working on A/C units, especially if you don't know what you are doing.
>
> --
> Will Honea

Re: Need advice on Cherokee aircon
 

Ditto.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Will Honea wrote:
>
> R134a is the refrigerant, not the model. If this is the extent of
> your knowlege, I'd suggest doing without A/C until you either do some
> serious studying of A/C manuals - or follow the manual advice and find
> someone who knows what they are doing. Mistakes on this are
> expensive. As you have expressed a keen interest in you personal body
> integrity, you should also know that there are serious risks when
> working on A/C units, especially if you don't know what you are doing.
>
> --
> Will Honea

Re: Need advice on Cherokee aircon
 

I checked out the following and it was bang on!. It looks like I am low on
fluid after all. This answers my main line of investigation, i.e. is it a
simple electrical fault/bad connection etc that could be simply fixed. (I've
found over the years that it pays to eliminate the simple things first). I
shorted those pins and the clutch came right in. I ran it for about 20
seconds and then shut it all down and it made a stange gurgling sound for
nearly as long. The next thing to figure out is why I am low. I have a funny
feeling that the vehicle has been apart in a major way some time in its life
but I have no history for the car. I can't ask the guy I bought it off as he
moved out of the area, address unknown, and I foolishly didnt chck the air
when I bought it as it was very cold and I never thought about it. (sounds
silly, I know, but I've bought cars in summer too, and never checked the
heater!)

I think -grits teeth-that my next step is to an aircon place and just have
them charge it up and see what happens. But I might just ask to watch.

Is it a lengthy procedure?


Mike


> Odds are your low on refrigerant due to a small leak somewhere. Usually
> in the seals.
>
> Here is how to check the low-side cutoff switch. Do not.. I repeat
> DO NOT run the AC like this for any period of time beyond doing this
> check. It can ruin the compressor.
>
> On the Accumulator
> http://members.cox.net/wilsond/Fixes...essure-low.jpg
> there is a sensor. Take the electrical connector off.
>
> Start the engine and turn the AC on.
> Take a piece of wire and connect the two pins in that connector.
> If your low on refrigerant the AC clutch will engage soon as you
> short these pins.
>
> They make 134a refill kits with pressure gauge. This might be
> all you need, but pay close attention to the instructions. If your
> not comfortable with doing this work then you should have a pro do it.
> Ask them if you can watch, that way if you ever have to do it again
> you will know what is involved.
>
> --
> DougW
>
>

Re: Need advice on Cherokee aircon
 

I checked out the following and it was bang on!. It looks like I am low on
fluid after all. This answers my main line of investigation, i.e. is it a
simple electrical fault/bad connection etc that could be simply fixed. (I've
found over the years that it pays to eliminate the simple things first). I
shorted those pins and the clutch came right in. I ran it for about 20
seconds and then shut it all down and it made a stange gurgling sound for
nearly as long. The next thing to figure out is why I am low. I have a funny
feeling that the vehicle has been apart in a major way some time in its life
but I have no history for the car. I can't ask the guy I bought it off as he
moved out of the area, address unknown, and I foolishly didnt chck the air
when I bought it as it was very cold and I never thought about it. (sounds
silly, I know, but I've bought cars in summer too, and never checked the
heater!)

I think -grits teeth-that my next step is to an aircon place and just have
them charge it up and see what happens. But I might just ask to watch.

Is it a lengthy procedure?


Mike


> Odds are your low on refrigerant due to a small leak somewhere. Usually
> in the seals.
>
> Here is how to check the low-side cutoff switch. Do not.. I repeat
> DO NOT run the AC like this for any period of time beyond doing this
> check. It can ruin the compressor.
>
> On the Accumulator
> http://members.cox.net/wilsond/Fixes...essure-low.jpg
> there is a sensor. Take the electrical connector off.
>
> Start the engine and turn the AC on.
> Take a piece of wire and connect the two pins in that connector.
> If your low on refrigerant the AC clutch will engage soon as you
> short these pins.
>
> They make 134a refill kits with pressure gauge. This might be
> all you need, but pay close attention to the instructions. If your
> not comfortable with doing this work then you should have a pro do it.
> Ask them if you can watch, that way if you ever have to do it again
> you will know what is involved.
>
> --
> DougW
>
>

Re: Need advice on Cherokee aircon
 

I checked out the following and it was bang on!. It looks like I am low on
fluid after all. This answers my main line of investigation, i.e. is it a
simple electrical fault/bad connection etc that could be simply fixed. (I've
found over the years that it pays to eliminate the simple things first). I
shorted those pins and the clutch came right in. I ran it for about 20
seconds and then shut it all down and it made a stange gurgling sound for
nearly as long. The next thing to figure out is why I am low. I have a funny
feeling that the vehicle has been apart in a major way some time in its life
but I have no history for the car. I can't ask the guy I bought it off as he
moved out of the area, address unknown, and I foolishly didnt chck the air
when I bought it as it was very cold and I never thought about it. (sounds
silly, I know, but I've bought cars in summer too, and never checked the
heater!)

I think -grits teeth-that my next step is to an aircon place and just have
them charge it up and see what happens. But I might just ask to watch.

Is it a lengthy procedure?


Mike


> Odds are your low on refrigerant due to a small leak somewhere. Usually
> in the seals.
>
> Here is how to check the low-side cutoff switch. Do not.. I repeat
> DO NOT run the AC like this for any period of time beyond doing this
> check. It can ruin the compressor.
>
> On the Accumulator
> http://members.cox.net/wilsond/Fixes...essure-low.jpg
> there is a sensor. Take the electrical connector off.
>
> Start the engine and turn the AC on.
> Take a piece of wire and connect the two pins in that connector.
> If your low on refrigerant the AC clutch will engage soon as you
> short these pins.
>
> They make 134a refill kits with pressure gauge. This might be
> all you need, but pay close attention to the instructions. If your
> not comfortable with doing this work then you should have a pro do it.
> Ask them if you can watch, that way if you ever have to do it again
> you will know what is involved.
>
> --
> DougW
>
>