Question about Carrier XHB123D X/Y Series Heat/Cool Air Conditioner
Switching to emergency heat will not defrost the unit.
If the Heat pump is malfunctioning, continue to use the emergency heat until the unit can be repaired properly.
At ten degrees, no heat pump can keep up., but it should be automatically bringing on the heat strips as back up heat. (same thing as emergency heat, it's just automatic.)
Either the extreme cold is overloading the defrost system, due to lack of properly operating exterior temp sensors or the defrost is malfunctioning,
Posted on Feb 07, 2010
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Posted on Jan 02, 2017
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