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  1. #1

    Confused Air Ease Furnace Cycling

    We have an Air Ease Ultra80 oil furnace. (combo forced air heat/AC system). Model # LUF80A112/125D20-2 A

    Last summer I installed a LUX programmable thermostat (TX9100E).

    Had no issues with cooling in summer.

    Now that the heat is coming on, I noticed it is cycling differently than before.

    The furnace always had a purge cycle at end of heat cycle, but now it seems that the unit is going through a short cycle BEFORE the heat cycle as well: furnace fan comes on, runs for a few seconds (with NO HEAT produced), then shuts off. Then, a few seconds later, fan AND burner come on, run a normal heat cycle, then a purge.

    I was wondering if this is a single or two-stage furnace, and I might have the stat wired for the wrong one? I assumed it was a single stage, and wired it according to instructions for a single-stage. Can anyone confirm if this model is a single stage?

  2. #2
    Join Date
    Jun 2001
    Moore, Oklahoma, United States
    Double check all the installer settings on the Lux thermostat. Review the installation instructions.
    No DIY allowed on this site, so I can't get into details.

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