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Harman P68 wont shut down

Post in 'The Pellet Mill - Pellet and Multifuel Stoves' started by snodays700, Nov 3, 2013.

  1. snodays700

    snodays700 Member

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    When using my Harman P68 when it gets to temp. it keeps burning. I set the room temp to 55 and its keeps burning. and the rooms actual temp is 74. even in stove temp mode it does the same. please help

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  2. Bioburner

    Bioburner Minister of Fire

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    Make sure the stoves igniter is in auto not manual. Seems to be a rash of ESP failures this week.
  3. turbosporsche

    turbosporsche Member

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    Shelton,ct
    Do u have it set to auto or manual. If it's in manual when room temp is met it goes into maintenance mode . Auto mode will allow unit to shut down completely. Mine sometimes takes an hour.. Hope that helps
  4. snodays700

    snodays700 Member

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    it is in auto, it hasnt shut off all day and it has always been warmer than what the temp is set at by at least 10 deg.
  5. snodays700

    snodays700 Member

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    yes it is in auto always keep in auto
  6. DAKSY

    DAKSY Patriot Guard Rider Staff Member

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    When was the last time you pulled & cleaned your ESP?
  7. snodays700

    snodays700 Member

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    I haven't pulled it out, but I reached in from the back and wiped it off. How would you recommend cleaning it?
  8. DAKSY

    DAKSY Patriot Guard Rider Staff Member

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    Loc:
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    Remove the rear shroud on that side & remove the zipscrew holding the ESP in place, with a 1/4" nut driver or a 1/4 magnetic hex driver.
    CAREFULLY pull the ESP straight out of the exhaust port & wipe it clean. I spray some SpeedyWhite glass cleaner on a paper towel to clean mine. Then CAREFULLY insert it back into position & install the screw.
  9. snodays700

    snodays700 Member

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    I will have to give that a try tonight. Hopefully that's all it needs
  10. DAKSY

    DAKSY Patriot Guard Rider Staff Member

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    It might just be the answer. The ESP gets crudded up & the coating prevents the accurate temperature sensing operation...If you bent it AT ALL when you cleaned it from the outside, you'll have to replace it.
  11. snodays700

    snodays700 Member

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    Any idea what the cost
  12. DAKSY

    DAKSY Patriot Guard Rider Staff Member

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    Right round $50. You have to make sure the wiring harnesses are the same color, so you don't have to adjust the dip switches on the control board. They wires are either red or black...
  13. snodays700

    snodays700 Member

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    Good info to.know. thanks again
  14. MtDew

    MtDew Member

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    Where did you find a probe for $50? The one I recently bought was almost $80
  15. DAKSY

    DAKSY Patriot Guard Rider Staff Member

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    P38X2 likes this.
  16. MtDew

    MtDew Member

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  17. DAKSY

    DAKSY Patriot Guard Rider Staff Member

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    Sure. They also carry the other one with the black wire harness...
  18. P38X2

    P38X2 Minister of Fire

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    Dang. Great price!
  19. rayttt

    rayttt Feeling the Heat

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    I bought My Replacement Control Board from There. Their price was a good price ($225.00).
  20. snodays700

    snodays700 Member

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    Loc:
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    I took out the esp sensor and cleaned it. Its now polished stainless steel. Put it back in put the stove at 55 deg. The room temp. Was 70 deg and the stove fired back up thinking it was calling for heat.
    Now what do I try?
  21. ivanhoe

    ivanhoe Feeling the Heat

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    great white northern ontario
    Could be the temp knob needs cleaning or replacement. Not reading the desired temp and slightly off calibration.
  22. Bioburner

    Bioburner Minister of Fire

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    eBay seller has three pot switches for Harman board replacement for under $10. I just did them on a pc 45 board Saturday. Not at all hard to do if you have some soldering experience and iron etc.
  23. snodays700

    snodays700 Member

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    How do you clean the temp knob
  24. snodays700

    snodays700 Member

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    What do the pot switches control?
  25. Bioburner

    Bioburner Minister of Fire

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    One is the room temp. Another is the fan switch and last is the feed control.

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