Car Jerks When AC is On

November 5, 2023

The air conditioner is a great feature to have in your car for those hot, humid days. However, if your car begins to jolt and shake when you turn on the AC, it is a sign of a problem that needs immediate attention. Jerking and shaking are signs that the engine is being put under extra stress when running the AC, which can cause damage to your vehicle’s engine and AC system. The problem may also lead to reduced cooling performance.

A common issue is low refrigerant levels or a malfunctioning compressor. The compressor requires more electricity when the AC is on, so it’s important to keep the refrigerant level high and the compressor functioning properly.

Other common issues include a worn-out serpentine belt that is responsible for driving the AC compressor, electrical problems, and dirty air filters. Keeping up with regular maintenance, including oil changes and replacing air filters, can help prevent these problems from arising.

Ignoring the issue of a car jerking when the AC is on can lead to more extensive and expensive repairs down the road. To fix the problem, a qualified mechanic will need to inspect your vehicle and perform appropriate repairs. Some of these repairs may involve repairing engine misfires, adjusting the idling speed, or changing the spark plugs. In many cases, the jerking will disappear after proper maintenance and repairs are completed. Contact a certified mechanic for more information about diagnosing and fixing the problem.


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