What to Do When the Car Air Conditioning Stops Cooling?
2 Answers
There are several reasons why a car's air conditioning may stop cooling: 1. Quality and purity of refrigerant: The quality and purity of the refrigerant play a crucial role in the car's air conditioning system. Typically, poor-quality refrigerant can lead to inefficient operation of the air conditioner. 2. Condenser and radiator: The cooling efficiency of the condenser and radiator also affects the performance of the air conditioning. If not cleaned for a long time, the condenser and radiator can become covered with dust and debris. 3. Refrigerant usage: Many car owners believe that more refrigerant in the air conditioning system is better, but this is not the case. During the refrigerant charging process, the amount must be just right—too little results in insufficient pressure in the air conditioning pipes, while too much causes excessive pressure. In both scenarios, the air conditioner cannot function properly. 4. Quality of the expansion valve: The expansion valve is a critical component in the refrigeration system, usually installed between the liquid storage tank and the evaporator. A substandard expansion valve can prevent the refrigerant from performing its intended function.
When my car's air conditioning isn't cooling, I first stay calm and perform simple checks. The AC system might be low on refrigerant, similar to a fridge lacking power, resulting in poor cooling performance. At this point, I check if the cabin air filter is clogged—too much dust can block the vents and affect airflow. I also verify the AC mode settings to ensure it's not accidentally set to heat or the air recirculation isn't adjusted properly. Additionally, when starting the engine, I listen for the compressor's engagement sound; if absent, it might indicate a blown fuse or switch malfunction. Driving without AC on hot days is unbearable—last time on the highway, I got so overheated I had to pull over, roll down the windows, and prioritize safety. For routine maintenance, remember to replace the filter regularly and check refrigerant levels; generally, cleaning the filter every 3-4 months can save hassle.
