Air Conditioners freeze up from 2 different reasons:
- Lack of adequate airflow. A plugged up filter will restrict the air flow enough to cause a freeze up condition. Check your filter, if it's plugged - turn off the air conditioner for at least 2 hours to allow it to defrost prior to installing a clean filter & restarting.
Other airflow lack can be caused by dirty blower, failure of fan control or failure of fan motor. Turn off air conditioning system to allow it to defrost and call for service.
- Lack of adequate amount of refrigerant, usually called by a refrigerant like. Refrigerant has a pressure temperature relationship when the pressure drops the temperature drops. Once that drops below 32 degrees, the water in the air freezes onto your 32degreeF. Evaporator coil and the longer it runs like that the ticker the ice get. TURN THE UNIT OFF and call for service.
Your evaporator coil evaporates liquid refrigerant brought into it. If the coil is frozen, its not evaporating the liquid, then liquid is sent to your compressor liquid does not compress, serious damage could occur.
Once the system thaws our technician can determine cause of adequate pressure, it could be refrigerant, restriction or lack of refrigerant due to a leak. Call for service.