There are 3 switches that control the operation of the ac compressor . There is a high pressure switch that will not allow operation if the head pressure goes too high ( excessive gas-blocked system-tx valve condenser fan not working )There is a low pressure switch that stops the compressor when the gas has leaked out and is insufficient A thermostat that will not register and so will not switch on the compressor and finally ac compressors will not work unless both the ac switch and the blower are switched on. Have the system checked out by an accredited ac specialists.;l
SOURCE: Hot air blowing out on passanger side only, 03 Cadillac CTS
junk it its not worth it one of the sensors that open and shut the door are bad
SOURCE: Air won't blow hot or cold, at any speed.
on my grand, there is a variable resistor that controls fan speed. The wires feeding the resistor melted down. Turns out it was a very common problem for the year I have. I would look there first and eliminate that possibility. The power should be frigging fat wire about 8 or 10 gauge and is fed from one of your electrical junctions under the hood. The fusible links can look ok and actually be faulty, so test for the voltage and/or resistance at these points. If It is still down, and you are able to remove the fan, do a simple check to make sure its able to spin freely.
SOURCE: Air Conditioner works intermittently
It could be your low pressure cycle switch is going bad. Check the connection to the switch and it's is located on the A/C Accumulator. The other thing to check is the A/C relay and that is located in the glove box. There is a panel in the glove box that say's relay, there is three relays in there and one of the out side relay's out of the three is the A/C. can not remember which one it is. The middle relay is the fuel pump and the other one is the third break light. Switch the two out side relays and see if your A/C get's better. the other thing too is if the R134a is just a little low, and needs to be topped off. Good luck and hope this helps. if your going to try to recharge the A/C system your self, keep in mind not to over charge.
SOURCE: Acura integra 96 Air Conditioner compressor did not run
Check the A.C>Relay or It could be low or leaking freon
SOURCE: 1996 lincoln towncar. No a/c compressor engagement unless jumped
the control unit is no good.i had a similar situation with a 98 tracker,and installed a switch to give it a ground for the compressor relay that comes from the a/c computer module.
it works good and goes on and off with the a/c switch.
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