Can I drive with a broken AC compressor?

Driving with a broken AC compressor in some cases may be dangerous. If the problem with the component is merely that it has stopped working, perhaps due to an electrical issue, there might be no concern other than a loss of air conditioning in the cabin. On the other hand, if the problem is due to bad internal shaft bearings, then the serpentine belt that drives other systems - your power steering, electrical system (alternator) and more - will also fail. Loss of power and steering can be quite a cause for concern.

What causes AC compressor failure?

An AC compressor typically fails due to a lack of proper lubrication. The AC system - and the compressor in particular - includes a special lubricant oil that ensures the compressor keeps working. If a refrigerant leak occurs in the system, compressor oil will leak out. Oil in the system will no longer circulate properly, and the compressor will be starved of lubrication. Overheating, shaft and bearing failure, and seizure can result. Other causes of AC compressor failure include refrigerant that is charged at too high a pressure, contaminants in the refrigerant, and blocked or dirty condenser cooling fins.

Why is AC repair so expensive?

Specialized (and expensive) tools and equipment are essential when a technician services the AC system on your vehicle. A refrigerant recovery machine is necessary to capture the refrigerant that is extracted from the system. There are several refrigerants on the market, and a separate machine is needed for each. Some of those machines cost more than $6K. The refrigerant itself is also expensive. And the technician performing the service must be specially certified to do so. All these factors play into the cost of AC system repairs.