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HELP!! '97 Volvo 850 T5, A\C dose not work. 850 1997

posted by  someone claiming to be Peter on  Sun Jul 20 10:20 CST 2003 [RELATED]

It certainly sounds like an electrical problem, if your refrigerant charge is OK.
With the engine running and the A/C switched on, have your repair guy check for power at the connector to the compressor. If there is power, he could try bypassing the superheat switch on the back of the compressor, or checking for power in the wire just before it goes into the clutch (he will probably have to stick a pin into the wire to do that test.) If bypassing the superheat switch doesn't do it, and there is power going to the clutch, the clutch is bad.

If there is no power at the compressor connector, he should check for power in and out of the A/C relay. If there is power in and not out, the relay is bad. If there is not power in (it should come in on 2 pins), then you will have to diagnose whether the computer is getting a signal to turn on the A/C or if you have a computer problem.






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