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    alkm6943's Avatar
    alkm6943 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    May 10, 2007, 12:36 PM
    Interior furnace /heat pump iced over-why?
    We are just getting some hot weather so I turned thermostat to cool-- the interior furnace has iced over . I don't know what to do?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    May 10, 2007, 01:32 PM
    It could be a few things. Dirty air filter, blocked return air opening, closed supply registers,refrigerant leak,if the unit was left on and the night was cool that can also cause it to ice up because of a low ambiant condition.
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