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Ahren
Community Member
since ‎03-14-2024
‎03-20-2024

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Alt Heat not turning on during heat pump defrost cycle

03-14-2024
I have a duel fuel (2 stage heat pump plus 2 stage natural gas furnace) forced air system. Everything works fine except that alt heat (i.e. gas furnace) does not turn on during heat pump defrost cycles.The defrost cycle signal wire from the heat pump...