Testing your car’s AC compressor using a multimeter will help all drivers diagnose any potential issues with their vehicles. This enables you to extend the vehicle’s lifespan overall. A bad compressor is one of the many problems that can cause a car AC system to fail. Here are some common signs a compressor is going bad or failing.
Signs Of A Bad Car AC Compressor
The compressor is, without a doubt, the most important component of a car’s AC system. The compressor’s main functions include the following:
- Pressurizing refrigerant to cool the air.
- Moving air to the condenser.
- Monitoring and controlling temperature.
- Sensing temperature changes both inside and outside of the car.
Below are a few indications of a bad or failing car AC compressor.
AC Not Blowing Cold Air
This is one of the obvious signs of a compressor problem. If you notice the air coming into your cabin is not as cold as it should be, there could be an issue with the compressor.
Of course, there are other problems related to the AC unit that could cause the air to be warmer, but a bad compressor is the most likely culprit. You can have the air temperature tested to know if it should indeed be lower than it currently is.
Odd Engine Compartment Noises
There are numerous reasons why an engine may be emitting some strange sounds. If, on inspection, you hear any squealing, chirping, chattering, whining, or rattling noises coming from the compressor, it’s time for AC service.
Oftentimes the commotion will only erupt when engaging the AC switch. The noises may remain constant, though. Compressor noises are usually the result of a seizing or faulty clutch. Failure can happen if the compressor oil used for lubrication ultimately becomes contaminated, is insufficient, or is the wrong type.
Compressor Clutch Does Not Engage
When you turn on the AC, the clutch attached to the pulley on your compressor must engage. The clutch will appear as a plate on the front of the pulley. The clutch does not spin when the AC is off.
When the AC is turned on, the clutch can make a momentary click and begin spinning with the belt and pulley. The compressor should be serviced when the clutch doesn’t engage, or if it emits a whining or screeching noise when it does.
Visible Damage On The Compressor
Physical damage to the compressor or its clutch could indicate some sort of internal issue. This also applies to corrosion.
Moisture is often the enemy of any AC system, meaning corrosion could be a sign of a problem inside. Oil leaks can lead to a full compressor breakdown. Any visible damage calls for an immediate inspection of your AC system.
Other Related Compressor Concerns
The compressor is not the only component of an AC system that can go bad. Other issues within the system that are related to the compressor often include the following:
- Loss of refrigerant.
- Refrigerant blockage.
- Faulty blower motor.
- Blown fuse.
- Clogged cabin air filter.
- Worn out or broken serpentine belt.
How Much Does Car AC Compressor Replacement Cost?
Car a/c compressor replacement costs about $1600 for car AC compressor replacements with average prices ranging from $1200 to $2200 for car AC compressors in the US, according to Repairpal.com.
Disclaimer – This is not an actual quote. Contact Bridwell Auto Service Center today to get a quote for your project.
Live In The Scottsdale Area? Get Your Inspection Done At Bridwell Automotive Center!
Get your road trip inspection and preparation service done at Bridwell Automotive Center, located at 7171 E Lincoln Dr. Scottsdale, Arizona 85253 or call (480) 948-4781 for more information.
