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a/c problem

17K views 15 replies 10 participants last post by  rhall8068  
You need to check if you have any R134a in your system. First you need to use a proper set of gauges to check the amount of R134a that's in the system. If there is none, then run a vacuum pump to check for leaks. Refill the system and go from there. If you don't have enough R134a the system will not work properly. This is designed this way to protect the compressor. I bet you have a leak or crack in your rear AC Line.


Regards, JC.
 
Thanks JC. Unfortunately I don't have a manifold gauge set to check pressure on the high pressure side. (I can use my hose and gauge that recharges R134 into the low pressure side to check the pressure there.) I've already assumed that the most likely problem is low refrigerant. But to recharge the system I need the compressor running. The compressor doesn't run if the refrigerant is low. That sensor-detected cutoff protects the compressor. So I want to bypass the sensor and make the compressor run so I recharge the system. I'll do this with refrigerant that has an indicator dye to help identify any leak. This strategy also reassures me that the compressor and clutch are actually working by taking the sensor out of the picture. Yes, you sure wouldn't want the compressor to run for any significant length of time without refrigerant, but the only way I have to recharge the refrigerant is to have the compressor running.
The gauge set is around $50 at Harbor freight. It's worth the money trust me.

Regards, JC.
 
Send me a pm with your email and I will send you a link to the manual.

Regards, JC.