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What are the reasons why the Mercedes-Benz air conditioner does not cool when the AC is turned on?

1 Answers

LouisAnn

07/29/25 5:24pm

Mercedes-Benz air conditioner does not cool when the AC is turned on for the following reasons: 1. Damaged air conditioning flap: Damage to the air conditioning flap is relatively rare. It is located in the middle and lower part of the instrument panel and can only be replaced if damaged. 2. Dirty condenser: When the condenser is dirty, the heat dissipation of the air conditioner becomes poor, leading to reduced cooling efficiency, so regular cleaning is necessary. 3. Damaged throttle valve and expansion valve: Malfunctions in the throttle valve and expansion valve can cause poor air conditioning performance. 4. Aging and slack of the compressor drive belt: The refrigerant relies on the moving parts of the air conditioning compressor, and a slack drive belt can cause the compressor to slip during operation. 5. Lack of refrigerant: Car air conditioners require refrigerant replenishment every two to three years of use.

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