Auto Air Conditioning Compressor Not Engaging

This switch is located on the metal canister next to the compressor.

Auto air conditioning compressor not engaging.

Engaging the ac compressor clutch at home is not rocket science. This is a full explanation of how the system works. Opening a can of r134a into the system usually overrides the low pressure switch. Nevertheless if this does not help it might be because you are using a bad ac compressor clutch.

This is not the pulley but the center piece that engages the pulley to the compressor shaft. Low level of refrigerant. Car air conditioner compressor clutch not engaging published on october 22 2015 october 22 2015 84 likes 13 comments. There are a couple of ways you can fix the problem to bring back the air conditioning system in order.

Here we have simplified three methods of engaging an ac compressor clutch all by yourself. This problem goes away by simply adding refrigerant. If the air conditioning compressor on a late model car does not engage the system is probably low on refrigerant and the low pressure switch prevents the compressor from turning on. It would be lucky if the ac could blow cool air and the compressor could engage.

If the clutch engages but the compressor does not turn it means that you probably need a new one. The good news is it s not. When diagnosing an air conditioning issue it s easiest to begin at the compressor. When the switch goes bad it will no longer be able to measure pressure and will leave the clutch engaged the entire time.

If so try the troubleshooting techniques described here. A faulty automotive air conditioner can be one of the more difficult issues to diagnose and repair. If you re here chances are you ve tried to recharge your ac system and found a compressor clutch not engaging issue. If the clutc h compressor doesn t engage there are more possibilities.

But sure you can t use your car s air conditioning system when this happens. The low pressure switch tells the car that the clutch needs to engage and disengage and will shut off the a c compressor. With the engine running turn the a c on max cool set fans high and make sure that the clutch is engaging on the compressor. What is the most common reason for an air conditioning compressor not to engage.

The clutch compressor is an integral part of the ac system of your car rendering this inoperable is a big inconvenience for the car s passengers. The main problem is possibly due to a pressure switch or faulty relay. If your car s air conditioner isn t blowing cold air the first thing you should look for are signs of leaking or an a c compressor that does not engage.