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Hey guys. Just picked up my 05 M6 6.0 two weeks ago. A/C was working fine when I bought it, then one day just stopped. The light on the A/C button illuminates, but you can't hear the clutch engaging or the engine loading. Nor does it blow cold air. Replaced the relay just to make sure and it didn't fix it. No noise coming from the compressor...dealer is giving me the runaround too.

Any ideas?
 

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Does the compressor clutch engage? Pop a gauge on it and see if you have refrigerant pressure. The clutch is pressure actuated.
 
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