Replaced r12 still blows hot air only
is your pressure sensor on the condensor working, it controls the engaging and disengaging of the compressor, if your compressor doesnt enguage it could be a bad compressor, and with my old c4 vette which was a 1992 the test for it was to run the ac on max, let the compressor try to cycle on its on, if it doesnt unplug the pressure switch on the condensor, but (WARNING: YOU MUST DO THIS EXACTLY AS STATED) plug it back in with in 5 seconds. as the pressure switch is what tells the compressor to engage, (NOT PLUGGING IT IN WITHIN 5 SECONDS COULD CAUSE YOUR SYSTEM TO BE OVER CHARGED AND EXPLODE.) . if your ac clutch does engage and your starts running the compressor with in that 5 seconds, your compressor is good. but this will also narrow it down to an either A: and over charged system or B: a bad sensor on the condensor. or C: if your compressor runs constantly, and undercharged system. Make sure to check for leaks, use some water around the two a/c system servicing ports, check the high and the low side as over time the O-rings deteriorate, and even though they have the plastic cap on them they can leak. remove the plastic caps, and put some soapy water around them and see if you get in bubbling with the system on. On my 92 the a/c use to leak down ever 30 days, i thought it was the compressor leaking during operation. i soap water tested all the connections and it was the service connections leaking. Went to autozone, replace the caps, reserviced, and went 3 years (Before selling the car) without having to service it again.
Aug 10, 2010 |
1990 Chevrolet Corvette