- This topic has 7 replies, 6 voices, and was last updated 12 years, 7 months ago by
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Your readings to the compressor and condenser fan should be 12v The compressor and fans
should have there own relays. you need to locate them to test them. make sure the compressor
does not have a broken wire. it takes pos and neg to operate.not just one wire. also check the
low pressure switch is made.if not this will hold the comp offGM use to shut down the ac in the event of an overheat. You’ll need to clear the memory then try it.
Hey Guys, Thanks for the help..I found the issue. I should have stuck with the simplest thing first. I checked the system with my pressure gauges and apparently i have another leak somewhere. i had about a 1/3 can of r134 left over and when i put that in the low side, the compressor and fan went on. it must be a slow leak because when i initially charged the system 2 weeks ago i put a vacuum pump on it and it held perfect vacuum for over 2 hours. so i thought i had fixed all the leaks. Well i am off to try and find another leak. I guess the pressure switch did its job by no alowing the compressor to run with no 134a in the system.
Quoted From college man:
look at the access ports for the leaks. thanks for the update
+1
UV dye or a sniffer would be a good aid in diagnosis also.
Glad you found the electrical issue and good work as your electrical troubleshooting methods were spot on.
With the parts you replaced you should have also replaced the receiver dryer or accumulator, not sure what you have on that system. Also you would first need to put a vacuum on the system to check for leaks before charging the system and also to remove moisture from the system, skipping this step and not replacing the receiver dryer or accumulator could cause a future failure of the AC system.
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