Heat Pump operation question

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Old 10-27-20, 12:13 PM
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Heat Pump operation question

It gets to the low 20's at night and will get colder (WA State). Will a heat pump outdoor fan turn off when it's that cold to help efficiency? Not being a residential guy (commercial only) with very little heat pump experience I just noticed the fan not running the compressor was running and I noticed (I don't want to say smoke, could have been water vapor) coming out of it. Didn't want a possible burnout of my compressor, pulled the panic breaker! I let it set for a couple hours and fired it up, seems to be working normally. Anywho to repeat my question: Will a heat pump outdoor fan turn off when it's that cold to help efficiency?

THANKS GUYS!
 
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Old 10-27-20, 12:43 PM
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No, it runs all the time.
What you saw was defrost mode, where the unit switches into air conditioning and shuts the outdoor fan off.
 
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Old 10-27-20, 03:13 PM
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Welcome to the forums.

A disagree.... I've seen condenser fans cycled to maintain compressor head pressure.
Defrost definitely cycles the fan.
 
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