1. Excessive Engine Load: When you turn on your heater, it draws power from the engine to generate warmth. If your car's engine is already under heavy strain due to excessive idling or other factors, the additional load from the heater can cause the engine to struggle, resulting in shaking or vibrations.
2. Faulty EGR System: The exhaust gas recirculation (EGR) valve helps control the engine's emissions. A malfunctioning EGR system can lead to engine misfiring or imbalances, causing vibrations that you may feel in the car.
3. Vacuum Leak: A vacuum leak in the engine can disrupt the air-fuel mixture and lead to engine rough running and shaking. These vibrations can be more noticeable when you turn on the heater, which puts additional strain on the vacuum system.
4. Damaged Motor Mounts: Motor mounts are designed to absorb engine vibrations and prevent them from being transmitted to the car's body. If these mounts are worn or damaged, they can allow excessive engine vibrations to reach the cabin, causing the car to shake.
5. Electrical Issues: Electrical components, such as the alternator, battery, or wiring, play vital roles in ensuring smooth engine operation. Faulty electrical components can lead to voltage fluctuations or power supply interruptions that can cause the engine to shake.
If your car is shaking when you turn on the heater, it's important to have it inspected by a qualified mechanic. They can accurately diagnose the underlying issue and perform any necessary repairs to restore smooth operation.
