What Causes a Car's Air Conditioning to Not Cool?
3 Answers
There are several main reasons why a car's air conditioning may not cool properly: 1. Dirty condenser: The purpose of cleaning the radiator and condenser is mainly for heat dissipation. When cleaning, be sure to first use an air gun to blow away dirt before washing with a water gun. Otherwise, it may have the opposite effect—not only will the air conditioning not cool, but fuel consumption may also increase. 2. Substandard refrigerant and compressor oil: Excessive impurities in the refrigerant and compressor oil can also cause the car's air conditioning filter to clog, leading to poor cooling. This increases resistance and reduces the flow of refrigerant to the expansion valve, resulting in insufficient cooling capacity.
Hey, I've been driving for ten years and have encountered the issue of air conditioning not cooling several times. The most common cause is refrigerant leakage or insufficient levels, where there might be cracks in the car's piping or loose connections, leading to the refrigerant escaping. This becomes especially noticeable in the summer when driving—it gets unbearably hot. Another reason could be a faulty compressor; if it's not working, the entire system can't circulate the refrigerant. Once, I also had a situation where the blower got stuck and wouldn't spin, the fan wasn't blowing air, and no cold air came out—turned out to be a blown fuse. Regularly cleaning the AC filter can help reduce dust clogging the evaporator. In short, don't delay fixing it; otherwise, it could become dangerous in hot weather. I recommend finding a reliable repair shop as soon as possible—safety first.
As an amateur car enthusiast who loves tinkering with cars, I usually check the AC not cooling issue myself first. Start by taking a quick look at the fuse box to see if any fuses are blown. Then listen to see if the compressor kicks in – if it doesn’t spin, it might be a relay failure. Sometimes, the blower fan blades get jammed by debris, causing no airflow or cooling; I’ve cleaned them out a few times myself. Low refrigerant can be checked with a pressure gauge, but be cautious about leaks when recharging. Once, I mistakenly thought the switch was faulty, only to later find the evaporator frozen and blocking the lines, requiring thawing. On short trips, pay attention to unusual AC noises and address them promptly.