Why does the car vibrate severely when the air conditioning is turned on?

[DeMorgan]

There are several reasons why a car may vibrate severely when the air conditioning is turned on: 1. Throttle: As the vehicle accumulates more mileage, carbon deposits can form in various places, especially in the throttle. If the throttle is dirty, it can obstruct air intake, causing the engine to struggle or barely manage to drive the compressor. This results in noticeable shaking when the air conditioning is turned on. 2. Engine: The engine naturally vibrates during normal operation (including when the compressor is activated), but these vibrations are usually dampened by the engine mounts, making them less noticeable. If the engine mounts are collapsed or damaged, the engine's balance can be disrupted, and activating the compressor might reach a resonance frequency, intensifying the vibrations.