Tips to Keep Your Air Conditioner From Freezing

Tips to Keep Your Air Conditioner From FreezingA frozen air conditioner is a sure sign that something’s wrong with your cooling system related to either air flow or the refrigerant level. Besides losing the cooled air the A/C provides, the conditions that lay the groundwork for a frozen coil contribute to higher energy bills and wear on its components.

If your system stops cooling but continues to run, look for ice in and around the air handler. Turn it off immediately if ice is present to prevent mechanical damage to the compressor.

Air Flow

The air handler indoors contains an evaporator coil that carries the refrigerant. The air needs to blow over the coil at a specific speed to complete the heat exchange process. If there isn’t enough air blowing, the cold refrigerant inside it can’t remove as much heat from the air, and stays too cold, freezing the coil.

Slow air flow may be caused by an overly dirty air filter, a dirty coil, or a coil that’s covered with mold or biofilms. If the filter appears to be clean, the frozen air conditioner coil may need professional attention from an HVAC expert.

The technician will thoroughly clean the coil using a vacuum and brushes. If mold or biofilms are present, he or she will remove it using harmless chemical cleaners. The coil is an ideal place for biological growths because moisture forms on it that mold and bacteria require.

Since these growths harm indoor air quality, you may want to ask your contractor to install a UV (ultraviolet) light for the coil to prevent these growths.

Refrigerant Level

Low refrigerant will freeze the coil over and the only way to ascertain its level is to have an HVAC technician check it for you. They use special gauges and must have an EPA license to handle the refrigerant. After tracing and fixing the leak, the technician will bring the level up to the manufacturer’s specification.

A frozen air conditioner signals problems that usually require a professional’s attention. If you’d like to learn more, contact C.R. Wolfe Heating & Air Conditioning, proudly serving Middletown homeowners.

Our goal is to help educate our customers in Middletown, New York about energy and home comfort issues (specific to HVAC systems). For more information about a frozen air conditioner and other HVAC topics, download our free Home Comfort Guide or call us at 845-367-4482.

Credit/Copyright Attribution: “GSPhotography/Shutterstock”

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