Is Your Heat Pump's Outdoor Unit Freezing Over? Here's What Can Cause This Problem And How It Can Be Fixed
While a small amount of frost collecting on your heat pump's outside unit is normal, a unit that has iced over signifies that you have a serious problem on your hands. You're most likely to notice this in the morning, since low overnight temperatures make your heat pump's outdoor unit more likely to freeze. When a heat pump is operating in heating mode, the coils in the outdoor unit produce small amounts of condensation.