What Causes a Car's Air Conditioning to Stop Cooling During Midday High Temperatures?
2 Answers
Reasons and solutions for a car's air conditioning not cooling: 1. Insufficient refrigerant in the car's air conditioning: Prolonged use of the car's air conditioning can deplete the refrigerant, leading to inadequate cooling and affecting the air conditioning's performance. Solution: Refill the air conditioning refrigerant. 2. Refrigerant leakage in the car's air conditioning: Once the refrigerant leaks, both the indoor and outdoor units of the car's air conditioning will operate normally, but there will be no cooling effect, resulting in the air conditioning not cooling. Solution: Inspect the car's air conditioning system for damaged components such as pipelines, air conditioning pumps, condensers, and evaporator boxes that may cause refrigerant leakage, then replace the faulty parts. 3. Dirty condenser in the car's air conditioning: If the car's air conditioning is not cleaned after prolonged use, various impurities can cover the condenser, preventing it from dissipating heat properly. This leads to excessive pressure and temperature in the air conditioning system, causing the air conditioning pump to stop working to protect the system, resulting in no cooling.
A few days ago, my old car had the same issue. The harsher the sun, the weaker the AC became. After inspection, I found the condenser was too dirty. The front radiator was clogged with willow catkins and dead insects, as if the AC was wearing a mask. On hot days, poor heat dissipation caused the compressor to shut down, and the pressure value kept triggering alarms. After cleaning, it immediately became ice-cold. I also replaced the AC filter that hadn’t been changed in three years—now even the second fan setting makes my arms freeze. Remember to regularly flush the front radiator, especially after highway driving.