Mine defrosts just fine without AC. The only car I have where the AC even works is the Celebrity and I put that one away for winter. I think carmakers make the AC run with defrost for defogging, not necessarily for defrosting. Up in the north you dont need it, since any fog just becomes frost anyway and yes it the air is very dry in the winter.
Id disconnect the wire to the compressor clutch too in the winter if mine worked.
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Winter daily driver, parked most days right now
Summer daily driver
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