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rudes 09-03-2011 03:32 PM

2002 Cherokee A/C Not Working
My A/C stopped working all of a sudden. I drove to a friends house with cold air coming out of the vents and when leaving I had no A/C. Prior to it stopping the air was blowing cold so I don't see how it could be low on R134. The compressor does not switch on. I checked the heater control connectors and I checked the fuse and relay under the hood and they are all good. I pulled the plug off the compressor and checked for voltage and there is none when switched on. The system does not have a low pressure switch. There is a switch on the line by the condenser on the passenger side. Could it be this? Anyway to test this?

rudes 09-04-2011 11:38 AM

Re: 2002 Cherokee A/C Not Working
Turns out it DID need R134!

Frango100 09-04-2011 05:37 PM

Re: 2002 Cherokee A/C Not Working
And was the system checked for leaks?

rudes 09-06-2011 10:21 AM

Re: 2002 Cherokee A/C Not Working
I added a can of r134 with dye and looked with a light. The only place I think I see something is where this switch type device is attached to the condenser line on the front passenger side. Does anyone know what this is? I don't think it's called a low pressure switch but is like one.

Frango100 09-07-2011 01:01 PM

Re: 2002 Cherokee A/C Not Working
Its in fact called a pressure transducer and its installed with an O-ring on the discharge line close to the condensor. This transducer can be removed without loosing the refrigerant, because the connection has a schader type valve, which will close when removing the transducer.

rudes 09-07-2011 02:13 PM

Re: 2002 Cherokee A/C Not Working
Thanks...I'll try changing the O-ring.

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