Does the belt run freely when the compressor is not on? If not then you probably need a new clutch bearing. If the belt does not turn the pulley when the A/C is turned on and the compressor clutch is engaged then the compressor has seized and needs to be replaced. If this is the case the whole system needs to be flushed and cleaned and checked to see that the compressor debris has not clogged any of the passageways through the system. This failure of the compressor is known as a catastrophic failure and requires a system cleaning and inspection. The clutch may still be good and you may be able to get away with just a new compressor and reuse the old clutch. I would get a new clutch if it were me. Also I’m assuming that this is an R 12 system and has not been converted so you will probably have to have it converted so make sure your mechanic knows what he’s doing and uses the proper oil that matches what comes in the new compressor.
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- A/C Doesn’t work then belt begins to squeal and creates burnt rubber smell. Compressor?