Harmon ESP code but still operating

hearthtools Posted By hearthtools, Mar 9, 2018 at 3:17 PM

  1. hearthtools

    hearthtools
    Moderator Emeritus 2.
    NULL
    

    Jan 6, 2006
    2,090
    44
    Loc:
    Oakhurst, California, USA, Earth
    I never sold Harman and have only worked a dozen or so.
    I'm am no expert.
    Just received a call from homeowner that I serviced last year.
    He said after 20 minutes the ESP code is fashing but stove is still operating normal.
    I told him to clean the combustion chambers and brush off ESP and be sure the room temp sensor wires are connected to stove.
    Any ideas.
     
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  2. MSmith66

    MSmith66
    Feeling the Heat 2.
    NULL
    

    Feb 5, 2008
    435
    30
    Loc:
    Central NY
    The ESP flashing is cause by the probe going out of range, either High or Low. If there is a port for the DDM on their control board you might see the ESP probe temp. spiking and lowering. shutting the stove down on its own and unplugging the stove will reset the board. Sometimes the probe is to far gone and will need to be replaced. I have see it in a number of stoves. My P61 will flash even through it is running fine, I shut the stove down, pull the probe clean it off, plug back in, start it up and no more flashing.
     
  3. hearthtools

    hearthtools
    Moderator Emeritus 2.
    NULL
    

    Jan 6, 2006
    2,090
    44
    Loc:
    Oakhurst, California, USA, Earth
    Thanks
    He called back said he brushed off prope and it's no longer flashing.
    Stove was working just flashing


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