What are the reasons for the Mercedes-Benz GLA air conditioning not cooling?
2 Answers
Reasons for the Mercedes-Benz GLA air conditioning not cooling: 1. Insufficient refrigerant, leaks in the pipeline, or damage to the refrigerant pressure sensor. This leads to excessively low pressure in the refrigerant circulation loop, activating the self-protection mechanism of the air conditioning compressor, which automatically shuts off the compressor, resulting in no cooling. 2. Blockage of the air conditioning condenser. The dashboard may indicate high water temperature, and the air conditioning cooling effect may be poor. 3. Faulty indoor temperature sensor. This sensor detects the indoor ambient temperature and provides the comfort control unit with internal temperature signals. The unit compares the indoor and outdoor temperatures to regulate the cabin temperature. If the indoor temperature sensor or its related wiring and connectors malfunction, the comfort control unit cannot compare and determine the temperature, thus failing to adjust the cabin temperature. 4. Faulty outdoor temperature sensor. This sensor detects the outdoor ambient temperature and provides the comfort control unit with external temperature signals. The unit compares the indoor and outdoor temperatures to regulate the cabin temperature. If the outdoor temperature sensor or its related wiring and connectors malfunction, the comfort control unit cannot compare and determine the temperature, thus failing to adjust the cabin temperature. 5. Faulty air flaps or air flap motor and related wiring. If the air flaps are stuck, even if the cooling function is normal, cold air can only blow out through small gaps, making effective cooling impossible.
I was driving my Mercedes-Benz GLA for an outing when the summer heatwave hit, and suddenly the air conditioning stopped blowing cold air. The temperature inside the car soared, making it unbearable. I rushed to a professional repair shop, where the mechanic diagnosed it as a refrigerant leak, possibly due to loose pipe connections or system aging. After refilling the refrigerant, it was fixed. The mechanic also advised me to regularly check the air conditioning filter and pressure system to prevent minor issues from escalating. I also learned that Mercedes-Benz air conditioning systems sometimes experience electrical faults, such as sensor failures or compressor wear, and early detection can save significant costs. In short, don’t delay if the air conditioning isn’t cooling—it affects health and driving safety, especially during long-distance trips when issues are more likely to arise.
