01/24/2026
Why Ice Storms Are Risky for Heat Pumps:
If you notice it is not staying warm in the house, you might have ice build-up outside.
Ice Damage: Falling icicles or buildup can break the fan motor. If this is the case, switch to aux heat or em heat at your thermostat.
Heat Pumps in Ice Storms:
Use Emergency Heat: If the unit is heavily iced, switch to "Emergency Heat" or "Auxiliary Heat" on your thermostat. This stops the outdoor fan, preventing it from striking built-up ice and breaking.
Monitor Defrost Cycles: It is normal for a heat pump to make loud "whooshing" sounds and steam during defrost cycles.
Clear Debris Gently: Remove sleet or snow from around the unit, but do not use sharp tools, which can damage coils.
Protection: Do not cover the top of the unit completely, as this restricts airflow. A, 3-sided, elevated, or sloped, structure can protect it, but it should not directly sit on top.
Check for Damage: If the unit is covered in more than 1+ inches of ice, it is safer to turn it off to avoid damaging the motor.