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  1. #1
    Join Date
    Oct 2005
    Location
    Hockessin,DE
    Posts
    88
    If for some reason I set the thermostat higher than outside temp (lets say 85F when I know I'm gonna be away for awhile) - would a heat pump come on and start heating the house in summer to bring it up to 85 (if the outside temp drops to below 85 (such as at night)?

    if so, is there some way to prevent it from doing this?

    thanks this would help me greatly with my decision
    http://www.hvac-talk.com/vbb/showthr...threadid=88466

    thanks yall are GREAT!
    -shaum

  2. #2
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,915
    It would only try to heat the house up to the 85Ί set point if you had the thermostat switched to heat...
    If more government is the answer, then it's a really stupid question.

  3. #3
    Join Date
    Oct 2005
    Location
    Hockessin,DE
    Posts
    88

    let me get this right...

    so it doesn't go just based on the temp on the thermostat
    i have to manually set it to "heat" mode right?

  4. #4
    Join Date
    Dec 2002
    Location
    Rochester, MN
    Posts
    5,305

    Re: let me get this right...

    Originally posted by shaum76
    so it doesn't go just based on the temp on the thermostat
    i have to manually set it to "heat" mode right?
    That's right.. Or unless you have "AUTO" change over on the T-stat.

  5. #5
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,915
    Even with an auto changover thermostat, there will be a temperature differential between the cooling and the heating set points.

    A heat pump system turns on and off based on the thermostat setpoint and mode just like any other system that is controled by a thermostat...
    If more government is the answer, then it's a really stupid question.

  6. #6
    Join Date
    Sep 2002
    Location
    I don't know
    Posts
    2,905
    Yes - that goes for any system.

    When the thermostat is set to cool, it will only turn it on when the indoor temperature is lower than that of the setpoint. Secondly, heatpumps only heat when the reversing valve is not energized. (it always is upon a call for air conditioning)

    A thermostat is nothing other than an automatic switch based on temperature.

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