Why does the car shake when the AC is turned on?

[AubreeLee]

The most common reason for engine shaking when the AC is turned on is dust accumulation in the throttle body. High compressor pressure: Excessive pressure increases the engine load, which affects the car's stability. During operation, carbon deposits form in the throttle body. Too much carbon buildup can block normal engine air intake, causing insufficient engine power to drive the compressor or barely managing to do so. Engine carbon deposits or aging: If the car experiences idle shaking, the issue usually lies with the engine. If the engine is not cleaned for a long time or shows signs of aging, it can affect normal engine operation. Carbon deposits on spark plugs: After prolonged use, spark plugs accumulate carbon deposits. If not cleaned in time, this can reduce engine torque output, causing the AC to shake.

[EllieMarie]

I often use the air conditioning while driving, and shivering when it's too cold is a common occurrence, mainly due to the large temperature difference causing discomfort to the body. In summer, when it's scorching hot outside like a steamer, suddenly setting the car's air conditioning to the lowest temperature, below 18 degrees, with cold air blowing directly, the body can't handle it and starts to shiver. I feel the position of the air vents is crucial—avoid pointing them directly at the face or body; instead, adjust them towards the windshield or legs. Regarding temperature settings, it's advisable to set it between 24 to 26 degrees, cooling down gradually rather than turning it up too high all at once. Also, the auto mode of the air conditioning can sometimes be unreliable, possibly due to incorrect settings causing continuous cold air. Check if the temperature adjustment button is within a reasonable range. If you're still shivering, try raising the temperature a bit or manually controlling the fan speed. Additionally, always keep a light jacket in the car for unexpected needs.

[Khloe]

I've encountered this situation multiple times while driving. The shivering is likely caused by discomfort from having the air conditioning turned up too high. For example, prolonged direct exposure of cold air to the skin can trigger muscle contractions and trembling. I believe prevention is key. If it's very hot outside before driving, first open the door to ventilate before turning on the AC, setting the temperature around 22 degrees Celsius, and avoiding the lowest setting. Don't aim the vents directly at your upper body; let them sweep across the corners. If you feel cold, immediately adjust the temperature higher or reduce the fan speed. The body needs time to adapt—rapid cooling isn't good for health and can easily lead to catching a cold. It's advisable to appropriately use the air recirculation function, as maintaining airflow can reduce the sensation of coldness. Always pay attention to the interior temperature and comfort level—safety comes first.

[DiMelanie]

The shivering with the AC on might be due to the temperature being set too low or an airflow issue. I feel the cold air is blowing too strongly, making my body unable to handle it, causing shivering. Try increasing the temperature, for example, setting it to around 25°C. Also, adjust the direction of the air vents to avoid blowing directly at you. This should help alleviate the discomfort.