Car Ac Compressor Not Turning on

Last Updated on June 19, 2023 by Ryan

A car AC compressor not turning on can be caused by a variety of issues. The most common is low refrigerant levels due to a leak in the system. If this is the cause, then you will need to repair or replace any seals that may have been damaged, and also fill up with fresh coolant.

Another possibility could be an electrical issue such as a blown fuse or defective wiring harness which would need to be replaced if necessary. It’s also possible that the compressor itself has malfunctioned and needs to be replaced. In some cases, debris from clogged condenser fins can prevent air flow which would require cleaning out those fins for proper operation of the compressor.

Lastly, there are various sensors and switches throughout the system that could potentially fail so they should all be checked before assuming anything else is wrong with it.

It can be incredibly frustrating when your car AC compressor isn’t turning on. The most likely cause is that the system has lost its charge, either due to a leak or simply because of age. To get the AC working again, you’ll need to have it recharged with refrigerant by a qualified technician.

If there are any leaks in the system, they will also need to be repaired before the AC can function properly again.

How To Fix Car AC – Compressor Not Working

What Causes a Car Ac Compressor to Not Kick On?

A car AC compressor will not kick on if it has suffered an electrical failure, mechanical malfunction, or lack of refrigerant. Electrical issues can be caused by a blown fuse, faulty wiring harnesses, or a bad relay switch. Mechanical problems such as restriction in the system lines, damaged pulleys and bearings can prevent the compressor from engaging.

Another common cause is low levels of refrigerant due to leaking hoses or a broken seal. If any of these components are not functioning properly, the AC compressor won’t kick on and cooling won’t be possible until it is fixed.

Why is My Car Ac Compressor Not Working But Fan is Running?

If your car’s AC compressor is not working but the fan is running there could be a few possible causes. The most common cause of this issue is a lack of refrigerant in the system, which could indicate that there’s been a leak somewhere and the AC needs to be recharged with refrigerant. Another potential problem could be an issue with one or more components of the compressor such as faulty wiring or worn out bearings, seals, and other parts.

Lastly, if you recently had some work done on your AC system it’s possible that something was installed incorrectly which could prevent the compressor from engaging properly. If any of these issues are suspected then it would be wise to have a professional mechanic take a look at your vehicle to diagnose and repair the problem accordingly.

How Do I Reset My Ac Compressor?

The best way to reset your AC compressor is to start by turning off the power supply of the air conditioner. Once that’s done, you’ll need to disconnect the wires from the compressor so they can be removed safely. Next, remove any debris or dirt that may have built up around the area of the compressor.

After this has been completed, you’ll need to reinstall all of these components back into their respective spots in order for them to work correctly and prevent future issues from occurring. Finally, turn on your power supply and test out your system to make sure it’s working properly again!

Car Ac Compressor Not Turning on


Car Ac Compressor Not Turning on And off

If your car’s air conditioning compressor isn’t turning on and off as you would expect, there may be several causes. The most likely culprit is a faulty relays or wiring in the system. It could also be due to low refrigerant levels, an obstructed condenser, or a faulty pressure switch.

If these common issues don’t appear to be the problem, it’s best to have a professional take a look at the system and diagnose any deeper problems that may exist.

New Car Ac Compressor Not Turning on

If your car’s air conditioning compressor is not turning on, it could be due to a lack of refrigerant or low pressure in the system. It may also be caused by an electrical issue such as a faulty relay switch, fuse, wiring problem or defective compressor clutch. To diagnose and fix the problem, you should consult a professional mechanic who can inspect the system and replace any necessary parts.

Car Ac Compressor Failure Symptoms

Car air conditioner compressor failure can manifest in a few different ways. One of the most common symptoms is an unusually loud noise coming from the engine compartment, which could be anything from grinding or squealing to a clattering sound. Additionally, if your AC isn’t blowing cold air like it used to, this could also indicate that there’s an issue with the compressor.

Finally, you may notice vibrations coming from under the hood when running your car for extended periods of time—this too might suggest that something has gone wrong with your compressor.


In conclusion, it is important to remember that if your car’s AC compressor does not turn on, you should check for any issues with the electrical system. You may need to troubleshoot wiring and connectors or replace damaged parts. If all else fails, take your vehicle to a professional mechanic who can diagnose and solve the problem.

Taking prompt action will help ensure that your air conditioning compressor is working properly and you are comfortable while driving during hot weather conditions.


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