A frozen air conditioner is a cause for concern. You want the unit to cool a room but not freeze up as this would hinder the A/C from doing its job properly. If it happens, then you have to get to the bottom of things. Learn what has happened so that you’ll know how to fix it. Here are a few of the things which are known to cause freezing:
Clogged Air Filters
Air filters prevent impurities from entering the system to improve air quality inside the room and keep the unit clean on the inside. They reduce the rate of air flow into the A/C but not by much. Things only become problematic when the filters get so dirty that they block air from coming in. The compressor then has to overcompensate and work a lot harder than usual. Vastly reduced airflow means that there is less hot air going to the evaporator coils to keep it from freezing. Change the filters when it gets too dirty. They are usually good for only a few months.
The refrigerant is the main vehicle for heat transfer around the system. It absorbs heat from the room and dumps it outside to lower the indoor temperature. There is an optimal level of refrigerant that must be maintained to keep things humming along well. Sometimes leaks can happen and the substance slowly goes out of the system. Freezing is one of the potential results as the evaporator coil may become too cold. A technician must step in to fix the leaks and recharge the system with more refrigerant.
A broken thermostat may also lead to freeze ups. Oftentimes there is no real need to have the air conditioner on as the weather is cold enough anyway. You may think that you have set the A/C to turn off at a particular time but it kept on churning anyway because the thermostat was unresponsive. If you observe this problem, then have the unit checked by a professional to get back control.
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