Derek Cole explains why your heat pump releases steam and makes noise when switching modes. The reversing valve shifts to AC, strip heaters activate to prevent cold air, and the burning smell that follows is normal, not a malfunction.
That's why you hear that big noise of. Because the. This reversing valve switching directions is going. So it's actually going back to AC mode. But then the strip heaters are turned on so you don't get cold in the house. But you look outside, you see steam. If your strip heater hadn't run in a long time, you probably smell like a burning smell. And then you look outside and see the steam coming from the unit, you're like, I think it's on fire. I think it's something on fire when it's just normal operation, so.
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