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My AC compressor is not engaging.I checked all the fuses inside the car and in the engine bay.What else could be the problem?
 

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It could be simply due to a loss in pressure of your AC system (needing a recharge and possibly a leak fixed). Or it could be the AC compressor clutch is broken (the problem I had with my 2001 MK4 Golf).

Dealers would say its cheaper/easier to replace the entire compressor, plus you can get them for a decent price at an auto wrecker. Just be sure to bring the car into a mechanic shop to get the AC system evacuated.

I would recommend getting a mechanic to discharge the AC system and do a pressure test to double-check for any leaks before moving forward with a new compressor - could be as simple as no refrigerant.
 

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I had the same issue. Turned out my spark plugs & throttle body were dirty and engine was Mis-firing, hence not generating enough power. Cleaned them and voila! AC started working! Give it a try.
 
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