11/06/2026
Ever notice your heat pump blowing cooler air for a few minutes during cold weather? ❄️
It may simply be running a defrost cycle.
When outdoor temperatures are cold, frost can build up on the outdoor coil of a heat pump. The system may temporarily switch into defrost mode to melt it and keep the heat pump operating properly.
You may notice cooler air from your vents or steam coming from the outdoor unit during this process. Both can be normal parts of a defrost cycle.
If your heat pump stays in defrost mode for an unusually long time or isn't keeping your home comfortable, it may be time to have it checked. https://newmanshvac.net/residential/heat-pumps/