Here's why:
* Compressor Damage: A noisy AC compressor usually indicates internal damage. Running the engine with a damaged compressor can lead to further damage, potentially seizing the compressor and causing the serpentine belt to break again. Worse, it could cause damage to the engine's crankshaft pulley.
* Belt Tensioner/Idler Pulley Damage: The AC compressor is part of the serpentine belt system's load. If the compressor is seized or extremely difficult to turn, it could put extra strain on the belt tensioner and idler pulley, leading to premature wear and failure.
* Other System Damage: Depending on the severity of the compressor failure, there could be other associated problems, such as refrigerant leaks. Running the system without addressing these issues could cause further damage.
What you should do instead:
1. Replace the AC compressor: This is the most effective solution. You'll need a new compressor, refrigerant, and potentially an AC system evacuation and recharge. This is often a job best left to a professional AC mechanic.
2. Remove the compressor belt: If you absolutely *must* stop the noise temporarily (though not recommended for long), carefully remove the serpentine belt by routing it around the *other* pulleys, leaving the compressor pulley out of the loop. But be aware this requires some mechanical skill and you must use proper tools to avoid damaging the belt or other components. You'll lose your air conditioning this way.
Before doing anything, consult a repair manual specific to your 1999 Ford Contour. This will show you the proper belt routing and the safest way to disconnect the compressor if needed. Attempting to bypass the compressor without the correct information can lead to serious problems.
