What causes AC icing?

Answer by  ZanArkand (7)

AC icing is most likely caused by insufficient airflow across the evaporation coil, or insufficient refrigerant in the system due to a leak. Blocked airflow is most likely the result of a dirty or improperly installed air filter. Another cause of icing is running the AC when the temperature is too low.

Answer by  Jelly69 (163)

Air conditioners will ice up when they are unable to drain excess condensation from the coils. If the air conditioner is improperly installed, the condensation from the cooling process cannot drain. This will cause the condensation to rapidly cool and ice up on the coils.

Answer by  kennethjgoodson (4903)

It is caused because the thermostat is not working properly. You can shut the ac off and let it thaw out and replace the thermostat.

Answer by  eiryck (847)

Lack of air flow around the cooling coil is one of the causes why air conditioning units would experience icing. Clean parts to have clear air flow.

Answer by  salsafoodie (3146)

One of the main reason why AC icing is because there is a lack of cooling that is coming from the AC. The best thing to find the solution is to turn off the AC and check the various areas to see where the problem is coming from. Changing air filters and bad fan motors are causes.

Answer by  dupont24 (42)

Ac icing is normally a direct cause of loe freon in the system and is usually corrected with adding more freon.