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  1. #1
    Big Traveler JCZhome's Avatar
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    A rolling stone....we're in Tucson, Az. now.
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    376TH, middle A/C comes on when I turn it to heat (not a heat pump)

    A couple of days ago when I turned the A/C on zone 2 (kitchen....or the middle one) up higher than the tempreture inside the unit.....way up....like 8 degrees warmer than it actually was, the A/C kept running. Finally had to turn it to "Off" to get it to stop.

    Last night I tried to turn the heater on and it would come on but the A/C would come on at the same time.

    Any ideas what to look for?
    SOLD my 2017 Momentum 376TH being pulled by a 2014 Ford F-350 Lariat, FX-4, Crew Cab, Longbed, Dually. Not pulling the 5er, catch me on my 2013 CVO Harley Ultra Classic.

    Map = states that we've stayed at least one night in our RV.

    http://visitedstatesmap.com/image/AR...TNTXUTWYsm.jpg

  2. #2
    Commercial Member huntr70's Avatar
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    The fan should be on "auto" when using the heat. It sounds as though it is on high or low, then it will run all the time.
    Steve- Inventory Manager at Tom Schaeffer's RV, Shoemakersville, PA www.tomschaeffers.com
    [email protected]
    2011 RAM 3500 SRW Outdoorsman Edition 4X4, 6.7 Cummins--TWEAKED!
    2021 Reflection 310RLS

  3. #3
    Long Hauler D2Reid's Avatar
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    Stick your hand up by the outflow on the air conditioner, if it is coming out warm you got a free heat pump upgrade.

    We did get the heat pump model. The Thermostat is finicky. Normally it scrolls through A/C hi/low with fan hi/lo/auto choices, then heat Elec then Heat Gas. Once or twice both the heat pump and the gas heater have come on at the same time. I have no idea how/why this happened. But then I couldn't get it to do it again. I talked to GD about it, they offered to send me a new thermostat. I told them to hold off, I wanted to be able to duplicate the problem so I knew for sure replacing the thermostat would fix it. It hasn't messed up since.
    Dallas
    2017 Momentum 376TH, 2019 Ford F450, Dual Rear Wheel, 4x4, diesel.
    2015 Harley-Davidson Street, XG750

  4. #4
    Big Traveler JCZhome's Avatar
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    No, no heat coming out of the A/C registers and......no "HP" on the thermostat. Neither do I have "Elec" and Gas on my t-stat. My t-stat only has "Cool", Fan, Furnace, Off.

    Anyway, somebody on the facebook page was able to provide me with the solution: Turn the thermostat off , hold the mode and zone button in at the same time until you see int 1,2,3 then push the on off button to exit, this should reset the temp. Differentials and stop both from running ,this is from dometic manual.

    Thank you for your input and help.....it's appreciated.
    SOLD my 2017 Momentum 376TH being pulled by a 2014 Ford F-350 Lariat, FX-4, Crew Cab, Longbed, Dually. Not pulling the 5er, catch me on my 2013 CVO Harley Ultra Classic.

    Map = states that we've stayed at least one night in our RV.

    http://visitedstatesmap.com/image/AR...TNTXUTWYsm.jpg

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