Car Jerking When AC is On: Causes and Solutions

Driving a car with the air conditioning on is a luxury that many of us cannot do without, especially during hot summer months. However, when your car starts to jerk or shake while the AC is on, it can be a cause for concern. This problem can be quite frustrating and even dangerous if it affects the car's performance. In this article, we will discuss the causes and solutions to why your car jerks when the AC is on.

What is Car Jerking?

Car jerking is a common issue that occurs when the car's engine is not running smoothly. It is often characterized by abrupt movements or vibrations that can be felt throughout the car, especially in the steering wheel. Jerking can happen when accelerating, idling, or even when cruising at a steady speed. When the AC is on, the problem can become more pronounced.

Causes of Car Jerking When AC is On

There are several reasons why your car might jerk or shake when the AC is on:

1. Low Refrigerant

One of the most common reasons why your car jerks when the AC is on is due to low refrigerant levels. The AC system relies on refrigerant to cool the air that blows into the cabin, and when the levels are low, the compressor can start to malfunction, causing the engine to jerk. This problem can be easily solved by adding more refrigerant to the system.

2. Dirty Air Filter

A dirty air filter can also cause your car to jerk when the AC is on. When the filter is clogged, it restricts the airflow, which can cause the engine to work harder, leading to jerking or shaking. Replacing the air filter is a simple solution that can solve this issue.

3. Failing AC Compressor

If the AC compressor is failing, it can also cause your car to jerk or shake. The compressor is responsible for compressing the refrigerant, and when it fails, it can cause the engine to work harder, leading to jerking or shaking. Replacing the compressor is the only solution to this problem.

4. Faulty Spark Plugs

Spark plugs are an essential component of the engine, and when they start to fail, they can cause jerking or shaking. This problem can be more pronounced when the AC is on because the engine is working harder. Replacing the spark plugs is a simple solution that can solve this issue.

5. Bad Alternator

The alternator is responsible for charging the battery and providing power to the electrical components of the car. When it starts to fail, it can cause the engine to jerk or shake, especially when the AC is on. Replacing the alternator is the only solution to this problem.

Solutions to Car Jerking When AC is On

Here are some solutions to help you fix the problem of your car jerking when the AC is on:

1. Check Refrigerant Levels

If you suspect that low refrigerant levels are causing the problem, you should check the levels and add more if necessary. You can do this yourself or take your car to a mechanic for a professional diagnosis.

2. Replace Air Filter

If a dirty air filter is causing the problem, you can easily replace it yourself or take your car to a mechanic for a professional replacement.

3. Replace AC Compressor

If the AC compressor is failing, you will need to replace it. This is a job that should be left to a professional mechanic.