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Old 01-02-2016, 09:03 AM   #1
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Heat Pump frosting


Was outside this morning cleaning up and noticed that the heat pump outside has a little bit of frost on the coils. Is this something I should be concerned about? Is it not as effective when it does this?

The weather when I seen it frosted slightly was

Outside
22 degree windchill
24 degree dewpoint
83% humidity

Indoor temp
set at 73 degree
actual temp 73
Humidity 36%

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Old 01-02-2016, 09:13 AM   #2
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Sounds like it was pretty cold in your area.
Frosting is normal. That's what the defrost control in the unit is for. Heavy ice/thick frost is not normal.

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Old 01-02-2016, 12:58 PM   #3
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Windchill has little to no bearing on a heat pump. Except when its in defrost.

Without knowing the actual temp, can't tell much about whether it should have a lot of frost or not.

30F at a 15MPH wind is a windchill of 19F.
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Old 01-02-2016, 04:33 PM   #4
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should defrost itself every 60-90 minutes or so or on demand when there's too much. most are timed.
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Last edited by user_12345a; 01-02-2016 at 04:43 PM.
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