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Old 12-31-2012, 09:50 PM   #1
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Roof unit freezing with heat pump on??

Anyone had this issue?
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Old 12-31-2012, 10:01 PM   #2
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No, both of ours have an automatic defrost cycle built in.
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Old 12-31-2012, 10:10 PM   #3
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Quote:
Originally Posted by Mr_D View Post
No, both of ours have an automatic defrost cycle built in.
Mine does as well. I have 3 units and the front one is the only one with an issue.
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Old 12-31-2012, 11:13 PM   #4
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With a heat pump, the outside coil becomes the evaporator. As you go below about 40 degf, the coil will most likely ice over to some degree. The controls should shut down the compressor and allow it to defrost and/or kick in the auxiliary heat. If it is iceing badly, you have a problem that you need to get it checked out.

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