When ice builds up on a heat pump’s coils, the system can’t absorb and move heat into your Marietta, GA house efficiently. Multiple underlying problems can make your heat pump system freeze. In this article, we’ll explain why that happens.

A Clogged Air Filter

An air filter keeps the indoor air clean by catching contaminants in the air. With time, the filters trap so many contaminants almost nothing can pass through. Consequently, very little air enters your heat pump.

Airflow blockages prevent sufficient warm air from flowing over the cold evaporator coil, so ice forms. Replace the filter often to avoid this problem.

A Faulty Reversing Valve

A reversing valve makes the refrigerant flow in different directions depending on the season. During winter, the refrigerant transfers heat from the environment into your house. During summer, the reversing valve allows the refrigerant to transfer heat from your indoor air to the outside environment.

This valve helps the heat pump melt any accumulated ice on the outdoor component during winter. It does this by intermittently changing the direction of the refrigerant flow, which forces the refrigerant to move heat from your indoor air to the outdoor component long enough to melt any accumulated ice. If this component is defective, the defrost mode can’t work, and ice forms on the outside unit.

Refrigerant Leaks

When the refrigerant levels are low, your system can’t transport sufficient heat to the outdoor unit to melt the accumulated ice. Low refrigerant levels also make the system work harder to meet your indoor temperature needs. Therefore, it’s essential to address the leaks immediately.

It’s not advisable to attempt DIY repairs to fix refrigerant leaks, as this fluid can harm your health. Schedule professional repair services to fix the leaks and recharge your system.

Our highly trained technicians have successfully eliminated multiple HVAC issues over the years, and you can count on them to do a good job every time. Ice buildup is a sign of trouble, and you should have our technicians inspect your system immediately. Contact the heating experts at E. Smith Heating & Air Conditioning to resolve the underlying problems.

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