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Heat-Timer EPU shuts down at end of heating cycle.

Our Heat-Timer EPU control panel shuts off altogether at the end of each cycle. Both lights are off. It doesn't come back on until I flip the toggle switch from Winter to Summer then back to Winter. Then the red "Weather Calls for Heat" light comes on, and the furnace fires up. Living on the 5th floor, it's a bit of a drag going down to the basement for this every few hours.

Any suggestions on how to remedy this?


    EBEBRATT-Ed Member Posts: 13,442
    edited November 2018
    That control has a "thermal lockout" built in. The control looks at outdoor temp and pipe temperature and will not start a cycle until the outdoor temp and the thermal lockout proves the piping has cooled off to start a new cycle.

    A lot of adjustment in those controls sounds like something has to be changed in the settings.

    How long ago was it installed and did it work previously??

    You can also download the manual online
  • donohuere
    donohuere Member Posts: 2
    Thanks for your reply, Ebebratt.
    The system was working properly last season. This year, we turned it on as usual, but nothing happens unless the Winter/Summer toggle is flipped from W to S and then back to W.
    The outside temp is plenty cold. The outside thermostat is working because the Weather light comes on when we toggle. We wait til the pipes cool down, but nothing happens unless the toggle is flipped.
    Got the manual, but it doesn't address this problem. If I'm reading it correctly, the EPU-CH has the lockout function, but not the EPU.
    The system was installed in 2006..
    Thanks again.
  • sjd
    sjd Member Posts: 2
    edited December 2022
    @EBEBRATT-Ed  I’m having the exact same issue. Did you ever figure out what it was and how to correct it? Please let me know 347-231-2862