Reasons for Mercedes-Benz Air Conditioning Not Cooling After Exposure to Sun
2 Answers
Reasons for Mercedes-Benz air conditioning not cooling after exposure to sun include dirty filters, lack of Freon, data errors, etc. Below are detailed explanations: 1. Dirty filters: No air or low air volume from the air conditioning requires checking if the air conditioning filter is dirty, whether the blower can operate normally, and if the air conditioning flap motor can switch properly. 2. Lack of Freon: Missing Freon in the air conditioning system requires checking for leaks in the system. After confirming and completing repairs, add Freon to the standard range. 3. Data errors: Incorrect data from various sensors such as the air conditioning pressure sensor and evaporator box sensor can lead to ineffective or incorrect regulation of the air conditioning system.
As a veteran driver with over 20 years of experience, I think the issue of Mercedes-Benz AC not cooling after sun exposure is quite common. It usually happens when the car is parked under intense sunlight for too long, causing overheating of front-end components. For example, the compressor might experience poor cooling - when temperatures get too high, it simply stops working, affecting cooling performance. Or the condenser cooling fan might fail; under scorching sun, the fan can't rotate properly, preventing heat dissipation and causing the AC system to shut down. Additionally, refrigerant pressure surges under high temperatures, and even minor leaks can make the AC stop cooling. I've also encountered loose wiring issues - high temperatures cause oxidation at connection points, interrupting current flow to the AC. My advice is to first park and let the car cool down before restarting the AC. If that doesn't work, have the cooling system and compressor checked. Regular maintenance should include cleaning the AC filter to prevent blocked air channels. Never delay fixing this - driving without AC in hot weather is unbearable and affects driving safety.
