Category: Heat Pumps

Heat Pump Defrost Cycles Explained: What’s Normal and What Signals a Problem

If you own a heat pump in Martinsville, VA, you may notice steam rising from the outdoor unit or hear a temporary change in sound during winter. While this can seem concerning, it is often part of a normal defrost cycle. Understanding how this process works helps you recognize what is expected and when professional service may be necessary. What Is a Heat Pump Defrost Cycle? When outdoor temperatures drop below approximately 40°F and humidity is present, frost can accumulate on the outdoor coil. To maintain efficiency, the system automatically switches into a defrost cycle. During this process, the unit...