What are the solutions for car air conditioner frosting?
3 Answers
There are several solutions for car frosting: 1. Start the car and use the warm air to blow on the windshield after the water temperature rises. The frost will melt after a while. Then use the wiper to clean it, which will make it very clean. However, this method takes a long time because the water temperature needs to rise to a higher level. 2. Use a hard plastic scraper to scrape, such as a snow shovel, various membership cards, or discarded bank cards. 3. Lift the wiper and operate the wiper spray motor to spray windshield washer fluid onto the windshield. The frost will quickly melt and soften, making it easy to wipe off with a light touch.
As an experienced driver who often drives, I've encountered air conditioner frosting several times, which is quite annoying. That time on the highway, the cold air suddenly stopped blowing, and I found the evaporator frozen. A common cause is a clogged air filter leading to insufficient airflow and poor cooling, resulting in icing. I usually remove the filter myself to clean it or simply replace it with a new one. If the frosting is severe, it's best to turn off the AC and use the heater to defrost the windshield for about ten minutes. If the problem recurs, it might be due to insufficient refrigerant or a leak. I'd use a pressure gauge to check, and if the pressure is low, I'd visit a professional shop to recharge the refrigerant and check the expansion valve, as a faulty valve can cause uneven cooling. Additionally, a dirty evaporator can also lead to icing, and cleaning it should solve the problem. Now, before summer, I make sure to have regular maintenance to avoid such hassles.
The root cause of air conditioning frosting is the evaporator temperature being too low, leading to icing. A common issue is a dirty air filter, which reduces airflow and causes a heat exchange imbalance. My suggestion is to first turn off the AC and run the heater for a few minutes to defrost, then remove the filter to check for blockages. Cleaning it or replacing it with a new one for just a few dozen yuan should solve the problem. Insufficient refrigerant pressure can also easily cause issues, so it's best to use a pressure testing tool to check for leaks and refill if necessary. A faulty expansion valve might sometimes cause the valve to be too small, leading to icing, which can be adjusted with a simple calibration. Also, avoid running the AC continuously for long periods; give it breaks to recover temperature. For prevention, keep the cabin clean to reduce dust and inspect the system every six months.
