Short explanatory clip (YouTube Short) by Derek Cole explaining heat pump auxiliary/emergency heat behavior. The speaker clarifies that switching a thermostat to auxiliary/emergency heat is sometimes recommended but can be costly; during auxiliary mode or defrost cycles the outdoor fan stops and indoor electric strip heat runs (often visible as steam during defrost), which is normal.
You have a heat pump and it's going on auxiliary only. So the mistake some folks make is they've been told that it's more efficient when it's cold outside to turn the thermostat to auxiliary heat or emergency heat and not heat pump heat. So when it goes into that mode, the outdoor fan will stop running outside, and the indoor fan and the strip heater run inside to keep you warm. That'll also happen when he's going into a defrost cycle. So if you're. If you haven't done that and just have it on heat, your heat pump will run. And when it goes in a defrost, that fan will stop, the electric heat will come on, and it will defrost that coral, which you'll see that steaming coming up when it's really cold in the morning. So that's normal.
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