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    richmond_va's Avatar
    richmond_va Posts: 1, Reputation: 1
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    #1

    Jan 8, 2009, 08:10 AM
    Attic Heat Pump Creates Draft Through Registers
    Hi,

    I bought a house with a standard natural gas furnace and a heat pump in the attic. The heat pump works great when I test it, but if I leave the switch on the thermostat set to EM HT (i.e. heat pump), once the heat kicks off it is replaced by a steady flow of cool air through the ducts/register. If I set the thermostat to HEAT (which is the furnace), there is no draft.

    Any idea why the heat pump would cause a constant cool draft?

    Any way to fix this draft problem?

    Thank you
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    Jan 8, 2009, 10:32 AM

    Well unless I`m mistaken, the them ht is emergancy heat which is your furnace,, when you set it to heat,(heatpump), backwards from your thinking ,so thinking you need to look into a fan control problem,or maybe tstat
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