What Causes the Mercedes-Benz AC to Not Cool When Turned On?

[ArianaAnn]

Insufficient refrigerant, leaks in the pipeline, or a damaged refrigerant pressure sensor can all cause the Mercedes-Benz AC to not cool when the AC is turned on. The specific reasons are as follows: 1. Damaged air conditioning flap. Damage to the air conditioning flap is relatively rare. It is located in the middle-lower part of the dashboard. If it is damaged, it can only be replaced, though replacement is very complicated. 2. Dirty condenser. When the condenser is dirty, the AC's heat dissipation becomes poor, leading to reduced cooling efficiency. Therefore, regular cleaning is necessary. 3. Damaged AC compressor, throttle valve, or expansion valve. The AC compressor is not easily damaged, but malfunctions in the throttle valve or expansion valve can cause poor AC performance. Diagnosing this issue is very troublesome and requires a visit to a 4S shop for repair. 4. Aged or loose compressor drive belt. The refrigerant relies on the moving parts driven by the AC compressor. A loose drive belt can cause the compressor to slip, so when the AC is not working properly, the engine belt should be checked.