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Should my Heil heat pump CH95 automatically defrost? And when?

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It depends if it has a defrost control built into it or not. Most units do not come with them installed they are an add on feature that you have to pay for. if the outside unit is icing up then the outside temperature is probably to low to run the compressor. I would switch over to aux. or emegency heat option on the thermostat as in low temperatures it is not efficent to run a heat pump anyway. Hope this helps have a wondeful evening.

Posted on Jan 30, 2010

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1 Answer

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1 Answer

My outside heat unit is frozen and it is 10 degrees out, will it thaw while I have it on emergency heat? How long do I keep emergency heat on?


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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,

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