Car Engine Shuts Off When AC Is Turned On

Causes

Low refrigerant levels

One of the most common causes of a car engine shutting off when the AC is turned on is low refrigerant levels. Refrigerant is a key component of an AC system, and it helps to cool the air that is blown into the passenger compartment. When refrigerant levels are low, the AC system will not be able to cool the air effectively, and this can cause the engine to overheat.

Faulty AC compressor

The AC compressor is another common culprit when it comes to car engines shutting off when the AC is turned on. The AC compressor is responsible for compressing the refrigerant and circulating it through the AC system. If the AC compressor is faulty, it will not be able to compress the refrigerant properly, and this can lead to low refrigerant levels and overheating.

Electrical problems

Electrical problems can also cause a car engine to shut off when the AC is turned on. These problems can include faulty wiring, loose connections, and blown fuses. Electrical problems can prevent the AC system from receiving the power it needs to operate, and this can lead to the engine shutting off.

Symptoms

In addition to the engine shutting off, there are a number of other symptoms that can indicate that there is a problem with your AC system. These symptoms include:

* Weak airflow from the AC vents
* Warm air coming from the AC vents
* A strange noise coming from the AC system
* A burning smell coming from the AC system

Diagnosis

If you are experiencing any of the symptoms listed above, it is important to have your AC system diagnosed by a qualified mechanic. The mechanic will be able to determine the cause of the problem and recommend the best course of action.

Repair

The repair for a car engine that shuts off when the AC is turned on will depend on the cause of the problem. If the problem is caused by low refrigerant levels, the mechanic will simply add more refrigerant to the system. If the problem is caused by a faulty AC compressor, the compressor will need to be replaced. If the problem is caused by electrical problems, the mechanic will need to repair or replace the faulty components.

Prevention

There are a few things you can do to help prevent your car engine from shutting off when the AC is turned on. These things include:

* Having your AC system serviced regularly
* Checking the refrigerant levels in your AC system regularly
* Replacing the AC compressor if it is faulty
* Repairing or replacing any faulty electrical components in your AC system

By following these tips, you can help to keep your AC system running properly and prevent your car engine from shutting off when the AC is turned on.