AC stops blowing cold air. Warm air begins to blow.
SOURCE: 1998 Volvo V70 A/C Intermittent
I had exactly the same problem. When your engine is cold and off check the gap on your ac compressor with a feeler gauge, it should be between 0.3 and 0.5mm. If it is larger you need to re-shim which invloves undoing a nut on the end off the compressor and removing the clutch plate, then removing the appropriate shims (look like washers) then replace. The reason it blows warm after 10 minutes or so is because the ac compressor gets hot and the clutch gap gets too large for the electro-magnetic clutch to engage. Some people would say that you need a new compressor but all you need to do is a re-shim.
SOURCE: no air or heat blowing from vents
Are you sure the controls you bought is good? Only a few things it can be. Control panel, Blower fan, and fuse. One of those are the problem. Cauld use a jumper wire to send power to the fan and see if fan cmes on. If it does then the fan is indeed good, then go and check and make sure power is on both sides of the fuse. then check the panel. could be bad. Panel sends signal to turn fan on and off. Good luck if need further help let me know, i will try to help ya. I am all about saving money.
SOURCE: 1998 Volvo V70 A/C intermittent
I AM AN ASE CERTIFIED VOLVO----MASTER TECH AND YOUR PROBLEM W`HICH IS COMMON ON ALL 850,S ANDS70,S THE PROBLEM IS PROBALLY AT LEAST 70% DUE TO AN AIR-FLOW RISTRICTION TO THE CONDENSOR FIRST IS SYSTEM AT FULL CHARGE LOW SIDE 25-33 PSI AND YOU AND I REPEAT ONLY CHARGE SYSTEM ON THE LOW SIDE THERE IS NO AND I REPEAT NO HIGH PRESSURE CONNECTOR AND WHAT I WOULD DO IS RUN AGOOD THICK WIRE FROM A/C COMPRESSOR AND A 30 AMP FUSE FROM A CIRCUIT LIKE THE HEATED SEATS FROM INSIDE THE CAR WITH A TOGGLE SWITCH AND A THERMOMETER IN CENTER AIR DUCT AND MANUALLY SHUT THE SYSTEM DOWN IF IT FALLS BELOW 40 DEGREES AND WATCH THE THERMOMETER EVERY 7 MINUTES AND THE MAIN PROBLEM IS THE ENGINE FAN CIRCUIT I HAVE DONE DOZENS OF THESE AND THE PROCEDURE IS WHAT I WROTE
SOURCE: Volvo S70 A/C only blowing cold on 5th (highest) setting
My guess would be that the resistor block located in side of air duct between blower fan and evaporatorbox has burnt out one or two resistor coils and requires replacing or repair.I have never seen Volvo A/c but would expect this to be the problem.The block is located in the airstream to keep it cool .By moving your setting switch you are selecting differing resistance coils (or a combination of same) thus with failure lose various speeds.
SOURCE: 1999 Volvo S70 heater and defroster blowing "fog"
suspect leaking heater core.check coolant level.
If this isn't the problem the AC compressor relay may also cause this, flip a coin.
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