Ice Building Up on Your Heat Pump? Here's What It Means
You step outside on a cold Raleigh morning and notice your heat pump looks like it has been through a snowstorm. Frost coats the outdoor coil, there may be ice on top of the cabinet, and the house feels a little cooler than it should. It is natural to wonder whether the system is about to quit on you.
The good news is that some frost on a heat pump in winter is completely normal. Heavy ice that never clears is not, and it can quickly turn a minor issue into a major repair. At Heating + Air Paramedics, we help homeowners across Raleigh, NC tell the difference every winter. Here is what that ice means and what to do about it.
Why Your Heat Pump Collects Frost in Cold Weather
In heating mode, your heat pump pulls heat from the outdoor air and moves it inside. To do that, the outdoor coil runs colder than the air around it. When temperatures hover near or below freezing and there is moisture in the air, that moisture condenses on the coil and freezes, much like frost forming on a car windshield overnight.
Raleigh winters, with mild days, cold damp nights, and periodic freezing rain, make this especially common. That is why every heat pump has a defrost cycle designed to melt frost before it becomes a problem.
