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Heating / AC gremlins V70-XC70 2002

posted by  someone claiming to be 53charlie on  Wed Jul 12 12:19 CST 2017 [RELATED]

My "new" 2002 v70 has several "opportunities", since it is so hot now the AC is the most pressing. It has the manual temperature control (no temp settings). First problem; the HVAC fan has come on by itself a few times, full on, with the car parked, locked. First time it drained the battery completely, the other times i caught it, turned the car on, AC off, fan off, then it quits.
Second problem, there is always some heat (even with dials all the way to cool) and obviously this makes the AC feel lukewarm once the engine comes up to temp. I set the speed of the fan about half way, but i notice it speeds up and slows down by itself.
the clutch seems to be ok, the compressor engages and runs which tells me there is enough refrigerant. but the cooling inside is mediocre. Any suggestions on how to test the individual "gates" and other components? any suggestions at all?






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