If your car’s air conditioner isn’t blowing cold air, you should first check the compressor clutch.
If the clutch is bad, it won’t engage, and the compressor won’t run. Now, how do I know if my AC clutch is bad?
The AC clutch is responsible for engaging and disengaging the compressor, which pumps refrigerant throughout the system, allowing you to enjoy cool air inside your vehicle.
A malfunctioning AC clutch can lead to poor AC performance, increased fuel consumption, and even damage to other components of your car’s AC system.
How Do I Know If My Ac Clutch Is Bad? Unveil the Causes
So, how do you know if your AC compressor clutch is bad?
Here are a few telltale signs:
1. The AC isn’t blowing cold air: This is the most obvious sign that something is wrong with your AC compressor clutch.
If your AC used to blow cold air but now it’s just blowing warm air, it indicates that the clutch is not engaging properly.
2. You hear a squealing noise when the AC is On If you hear a squealing noise coming from the engine bay when the AC is turned on, the AC compressor clutch is likely the culprit.
The squealing noise is caused by the clutch not engaging correctly, which causes the compressor to spin without actually doing anything.
3. The AC compressor doesn’t engage when the AC is turned On: If you turn on the AC and the compressor doesn’t engage, that’s a pretty clear sign that the clutch is bad.
In some cases, you may be able to see the compressor spinning, but it’s not doing anything because the clutch is not engaged.
How do you check an AC compressor clutch?
There are a few ways to check the AC compressor clutch to see if it is working properly.
One way is to feel the compressor while it is running. If the compressor clutch is engaged, you should feel a vibration coming from the compressor.
If the clutch is not engaged, you should not feel any vibration.
Another way to check the AC compressor clutch is to listen to the sound it makes while it is running.
If the clutch is engaged, you should hear a steady hum coming from the compressor.
If the clutch is not engaged, you should hear a clicking sound.
You can also check the AC compressor clutch by looking at the pulley.
If the clutch is engaged, the pulley should be turning. When the clutch is not engaged, the pulley should not be turning.
What causes AC compressor clutch failure?
There are several reasons why an AC compressor clutch might fail.
One possibility is that the clutch plate is damaged and needs to be replaced.
Another possibility is that the clutch bearings have failed.
Another possibility is that the compressor clutch armature plate is damaged.
How-to Test for AC Compressor Clutch Function
Can you replace just the clutch on an AC compressor?
Replacing just the clutch could cause damage to the compressor itself, which would then require an entirely new unit.
In short, if your AC compressor clutch is going bad, you may be able to replace just the clutch if the compressor is still in good condition.
However, if the compressor is also going bad, you must replace the entire unit.
AC compressor clutch noise
If your car’s air conditioning compressor clutch is making noise, there are a few possible causes.
The most common cause is a loose or damaged compressor clutch pulley.
If the pulley is loose, it can cause a rattling noise as it spins.
If the pulley is damaged, it can cause a grinding noise.
Another possible cause of compressor clutch noise is a faulty compressor clutch bearing.
If the bearing is damaged, it can cause a grinding noise.
If you hear any of these noises coming from your car’s air conditioning compressor, it’s important to have it checked out by a mechanic as soon as possible.
AC clutch replacement
Ac clutch replacement is one of the most common repair jobs on a car.
The AC clutch is responsible for engaging the compressor when the AC is turned on.
Over time, the AC clutch can wear out or become damaged, causing the compressor to not engage properly.
When this happens, the AC will not work properly and the car will need to be taken to a mechanic to have the clutch replaced.
Author: Ralph P. Sita
Ralph P. Sita is a seasoned professional with deep roots in both the HVAC and tech industries. His family’s business, Ralph P. Sita, Inc., is a locally owned and operated HVAC contractor with over 42 years of experience, serving the DC, Maryland, and Virginia areas. The company specializes in residential, commercial, and industrial heating, ventilation, and air conditioning services, offering everything from installation and maintenance to custom ductwork and indoor air quality solutions -www.ralphpsita.com. A former CPA, he spent the last decade as co-founder and co-CEO at Cybrary, a leading platform for cybersecurity and IT training. Cybrary became the largest, most well-known cybersecurity training businesses in the industry under his leadership. Smart AC Solutions is an opportunity to give back to the HVAC community by providing reliable, actionable information on all things heating and cooling.