Why is the car air conditioning not cooling?
2 Answers
Car air conditioning not cooling may be due to insufficient refrigerant; too much refrigerant; clogged filter screen; air entering the air conditioning system; insufficient heat dissipation capacity of the condenser. Here are the solutions for car air conditioning not cooling: 1. Clean the radiator and condenser: You can rinse the radiator and condenser at home with a water hose, but never use a high-pressure water gun because the condenser is made of very thin aluminum material, which can easily be deformed by high-pressure water. If it is too dirty, it is recommended to go directly to a 4S shop for cleaning. 2. Replace the air filter: It is recommended to replace the air filter once a year, but check it regularly every six months. 3. Check if the air conditioning lacks refrigerant: If it lacks refrigerant, just add some refrigerant, and also check for any refrigerant leaks.
Last time on a long drive, the AC suddenly stopped blowing cold air, which scared me into pulling over immediately. First, I felt the vents—no cold air, but the fan was running. My first thought was a refrigerant leak, since older cars' rubber hoses are prone to leaks. I popped the hood to check the compressor: the belt was intact, but the clutch wasn’t engaging. That’s when I realized it was a blown fuse! A temporary fix with a spare fuse did the trick. If you touch the AC low-pressure line and it’s not cold, it’s likely either a refrigerant leak or a compressor failure. In such cases, don’t force it—compressor damage hurts the wallet even more. It’s best to keep a simple pressure gauge in the car to check for low refrigerant levels.
