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Old 07-21-2011, 08:31 AM
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Default A/C compressor works but no cold air ?

My A/C was working for a while but its really warm now. The compressor turns on and off but I do not get anything for cold air. When it was working if i gave the car gas it would get warm and the air flow would shut down too ? Any ideas ?
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Old 07-21-2011, 09:36 AM
lev lev is offline
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Sounds like the system is low on refrigerant. And you need the valve that controls the vacuum to the vents, the exact name escapes me but a Volvo place knows what it is-cost little and is easy to fix.
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Old 07-21-2011, 12:51 PM
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Where is this valve ? Passenger area or in engine bay ?
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Old 07-21-2011, 04:00 PM
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Check freon levels first. and the valve is located with te car on front to ur left near the dryer I think is called is has switched on it.

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Old 07-21-2011, 09:56 PM
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Originally Posted by pdieni View Post
Where is this valve ? Passenger area or in engine bay ?
In addition to what Bluewater1 did here, in your case, I would also replace the Heater Control Valve (which is in the engine compartment, on one of the heater hoses/lines). These valves are cheap: $ 15-18 shipped.

When you check the Vacuum Controller, check the vacuum lines for cracks. Check also the vacuum reservoir for cracks.

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Old 07-22-2011, 08:38 AM
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I'm guessing you have automatic climate control? ACC? If so, there is also a very good chance the controller is weak or bad. On my 760, I could not use the auto position. I had to put it about 85 degrees and when the temp got down to that, I would start easing it down a few degerees at a time. Eventually it would cool at the temp I wanted. Air flow diminishing is a vac issue. It's quite possible you have a number of issues going on simultaneously.
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