Why does my heat pump run a long time,like at least a hour then cuts off for about five mintes then starts back up again? #2 why does the big fan on the pump stop turning sometimes? #3 what temp. should I be getting from my vents with the heat on,and should it remain the same no matter what the outside temp. is?

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Originally Posted by charles1963

#2 why does the big fan on the pump stop turning sometimes?

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You are likely in defrost mode when the OD fan stops.

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Originally Posted by charles1963

#3 what temp. should i be getting from my vents with the heat on,and should it remain the same no matter what the outside temp. is?

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Indoor vent discharge temp will drop with outdoor temp, or as the lift (delta t between ID and OD temps) becomes larger.

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Originally Posted by dac122

You are likely in defrost mode when the OD fan stops.



Indoor vent discharge temp will drop with outdoor temp, or as the lift (delta t between ID and OD temps) becomes larger.

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Thanks for your reply