Common Causes of AC Condenser Coils Freezing Over

The long, hot summers in Fort Worth, TX create a huge workload for your air conditioner. One of the most common problems with air conditioners is frozen condenser coils. Let’s take a look at the common causes of AC condenser coils freezing over and what you should do if this happens to your home’s cooling system.

Dirty Air Filter

Air filters capture tiny particles floating through your home’s air. After a couple of months, those particles clog the filter’s pores, which reduces airflow through your air conditioner. According to Energy Saver, low airflow is a common cause of frozen AC coils and many other preventable air conditioner problems. We recommend a monthly filter check and cleaning or replacing the filter at least every three months.

Refrigerant Leak

A chemical refrigerant cycles through your air conditioner, changing states from liquid to gas and low to high pressure as it moves through the system. When the refrigerant leaks out of the system, the air conditioner loses pressure. The low pressure causes frozen condenser coils. The system’s safety switch may prevent the AC from turning on if the pressure drops too low.

Broken Fan

Located outdoors, the condenser unit’s fan blades are constantly exposed to the elements. Leaves, pollen, bird droppings, and other debris may build up on the fan blades, which reduces airflow. Inclement weather, tree debris, and rust may damage the fan, resulting in bent blades or a broken motor. You’ll need professional AC repairs for a broken fan.

Malfunctioning Thermostat

The thermostat controls the timing of each AC cycle. If the thermostat’s sensor malfunctions, it might not properly read your home’s temperature. This may cause the AC to keep cycling, and the condenser coils will freeze. The thermostat may also get stuck in cooling mode, which also overworks the cooling system and leads to frozen condenser coils.

To learn more about the causes of frozen condenser coils, check out Air Techs Heating & Cooling’s professional AC repairs, or contact us today.

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