How Much Does It Cost To Replace An AC Compressor?

Air conditioners are now standard equipment in almost every vehicle on the road. They provide a cooler and more comfortable driving experience, even in the summer heat, and clear the windshield, side glass, and rear windows on cold days by demisting them. However, a failed AC compressor is a common problem in vehicle AC systems, rendering the AC useless. This article discusses the warning signs of a failing AC compressor and the cost to replace it.

What's A Car AC Compressor?

The AC compressor, as the name implies, pressurizes the refrigerant that cools the vehicle's interior. This compression activates the refrigerant's temperature-changing characteristics and circulates it throughout the system, supplying cold air into the cabin. The compressor is located in front of the engine and is driven by the engine via a drive belt and pulley.

When you turn on your car's air conditioning, an electromagnetic clutch engages to turn on the compressor. The compressor draws in the refrigerant, compresses it, and pumps it to the condenser, where it converts from gas to liquid and cools rapidly. The refrigerant then moves to the evaporator, the final component of the system, where it cools the car's interior and absorbs heat from the cabin.

How Much Does It Cost To Replace a Vehicle AC Compressor?

The cost to replace a vehicle AC compressor depends on the type of vehicle and location, as parts and labor costs vary. On average, replacing an AC compressor costs around $1,100, with labor costs ranging from $160 to $200 and parts from $650 to $840. Getting quotes from multiple shops can help save on costs. If you have mechanical intuition, you can avoid labor costs by replacing the compressor yourself, but keep in mind that this is a complex job that requires special tools and is only recommended for those familiar with the components.

Signs Of A Failing AC Compressor

• Less cold air from the AC vents. If there is less or no cold air from the AC vents, even with the temperature set to a minimum, the compressor may be the problem. This occurs because the failing compressor no longer provides the required pressure to circulate the refrigerant and cool the cabin.
• Strange noises from the engine compartment. Squealing, chattering, whining, or chirping sounds from the compressor indicate a malfunctioning compressor. These noises occur when the AC turns on and result from a faulty clutch, seized shafts, or contamination of the oil that lubricates the compressor, all of which cause the compressor to fail.
• Compressor clutch failing to engage. The clutch is a small plate attached to the pulley on the compressor that engages and disengages to turn the compressor on or off from the engine power whenever the AC is turned on. If it fails while engaged, the compressor will never stop running, and if it fails while disengaged, the compressor won't run at all. If the clutch fails to start or makes strange noises when it does, then the compressor needs attention.
• Refrigerant leak. The AC system has sensors that monitor the amount of refrigerant. If the refrigerant starts leaking, the sensors shut off the compressor to prevent harm to the system. This leak occurs when the compressor over-compresses the refrigerant due to internal problems, causing the seals to burst and leaking the refrigerant, preventing the compressor from functioning.
• Excessive wear on the drive belt. A failing pulley can move out of place while rotating due to worn-out bearings. The irregular movement affects the drive belt, producing screeching noises and accelerating the belt's premature wear. 

How To Maintain A Vehicle's AC Compressor

An air conditioner compressor often fails due to normal wear and tear, extended service, or neglect, and requires replacement. However, following these tips can help extend the life of your vehicle's AC compressor:

• Regularly use the compressor by switching on the AC frequently to keep its components lubricated. This will help prevent failure from neglect.
• Ensure appropriate pressure levels in the AC system by recharging the refrigerant from time to time.
• Undertake periodic electrical checks on the clutch's fuse, relay, coil, switches, and sensors and have the system attended to if something is out of the ordinary.
• Ensure the drive belts are cleaned and tightened to the proper tension.

Summary

A functioning AC compressor is necessary for a vehicle's air conditioning to perform at its best. Although replacing a faulty compressor can be expensive, having a professional perform the job and properly charge the system is always a good idea. Paying attention to the signs of a failing compressor will allow you to take timely action.

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