What is defrost mode?Updated 2 months ago

In cold and humid weather, frost can accumulate on the outdoor coil of a heat pump. When frost builds up, it blocks proper heat transfer, forcing the system to work harder while delivering less heat indoors.

To address this, heat pumps are equipped with an automatic defrost system. This system periodically removes frost from the outdoor coil to ensure safe operation and stable heating performance.

Defrost mode is not a malfunction—it is a protective and efficiency-optimizing feature.