Symptoms of a Bad or Failing AC Compressor Belt

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The AC compressor belt is a very simple component that plays a very important part in the AC system. It simply connects the compressor to the engine, allowing the compressor to be turned with the engine’s power. Without the belt, the AC compressor cannot turn and will be unable to pressurize the AC system.

With time and use, the belt will begin to eventually wear and will need to be replaced, as the belt is made of rubber. A simple visual inspection searching for a few cues to the belt’s overall condition will go a long way in keeping the belt and the entire AC system functioning properly.

1. Random cracking in the ribs of the belt

When examining the condition of the AC belt, or any belt for that matter, it is important to check the condition of the ribs. The ribs (or rib if it is a V-belt) ride on the pulley’s surface and provide the grip so that the belt can turn the compressor. Over time, with exposure to the heat of the engine, the rubber from the belt may begin to dry out and develop cracks. Cracks will weaken the belt and leave it more susceptible to breaking.

2. Chunks of the belt missing

If when you examine the belt you notice any chunks or pieces missing from the belt, then the belt is probably severely worn and needs to be replaced. As the belt ages and wears, chunks or pieces may break off from the belt as a result of multiple cracks forming near each other. When pieces begin to break off that is a sure sign that the belt is weakened and needs to be replaced.

2. Abrasions on the back or sides of the belt

If when examining the belt you notice any abrasions along the tops or sides of the belt, such as tears or loose hanging threads from the belt, then this is a sign that the belt has received damage in some way. Tears or abrasions along the sides of the belt may indicate damage from not riding the grooves of the pulley properly, while tears along the top may hint that the belt may have made contact with a foreign object such as a rock or bolt.

If you suspect that your AC belt may need replacing, have it first inspected by a professional technician, such as one from YourMechanic. They will be able to go over the symptoms and replace your AC belt if necessary.


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YourMechanic Car AC Belt Replacement Service

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4.9/5

Number of Reviews

178

Rating Summary
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Brandon

18 years of experience
772 reviews
Brandon
18 years of experience
Scion xB - AC Belt - Sanford, Florida
Brandon was the first mechanic I used on Your Mechanic and the experience was great. I would highly recommend him.
Hyundai Tucson - AC Belt - Saint Cloud, Florida
Brandon did a good job on my Hyundai Tucson 2009 no complaints he was on time ready to work and got straight to business conversated with him for a little bit wonderful guy I will recommend him to anyone

Lee

36 years of experience
81 reviews
Lee
36 years of experience
Saturn Sky - AC Belt - Edmond, Oklahoma
Lee Is a great mechanic, Trust is the most important factor in my opinion and Lee HAS MY TRUST! He knows what he is doing and is a effective communicator. He fixed my car fast, on time and on budget. I would welcome Lee back at my home anytime, he is that good! Thanks Lee

Gustavo

15 years of experience
44 reviews
Gustavo
15 years of experience
Chevrolet Silverado 1500 - AC Belt - San Marcos, Texas
Very knowledgeable. Explained what was going on, needed to be done now and gave recommendations for preventative maintenance. On time and work completed promptly. Would request and recommend Gus for future work on my vehicle as well as family and friends.

Chuy

12 years of experience
96 reviews
Chuy
12 years of experience
Cadillac Escalade ESV - AC Belt - Chicago, Illinois
After getting a quote from one of the big chains, I contacted Chuy. I couldn't have been more happy about that choice. He saved me hundreds of dollars and unnecessary work. Any future repairs and I'm calling Chuy.

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