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My heat pump froze solid during the February cold snap in Boise

It was 10 degrees out and the defrost cycle just couldn't keep up. What's the best emergency backup heat source for a situation like that?
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3 Comments
ray_williams
Ten degrees and it froze solid? That's wild.
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shane_hayes
My car's coolant froze at 15, @ray_williams, so I believe it.
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nelson.vera
Wait, coolant can freeze? Mine just turns into a slushie and my car sounds like a dying blender.
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