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Re: What's wrong with my a/c
Does the pressure in the low side (the larger tubing) drop when you turn the a.c. on? It normally should. I would expect the pressure to drop from maybe 140 psi (a.c. not on) to 40 psi (a.c. on and compressor spinning). Does the a.c. compressor spin with the a.c. turned on. Dont go by the sound of the fans, although they also need to be running. You have to be able to see the clutch plate on the end of a.c. compressor spinning. Is the drive belt tight enough to really turn the compressor? Some of the 'doors' on the heater/a.c.unit under the dash are controlled by vacuum. If the vacuum supply line comes loose, I dont know that the a.c. would deliver the cool air to the vents.
There are lots of other things it might be too.
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