In loving memory of Kenis D. Keathley 6/4/81 - 3/27/22 Loving father, husband, brother, friend and firewood hoarder Rest in peace, Dexterday

Anyone do the old Harman Gummy fix that causes the 6 Blink error and shuts down?

Discussion in 'Pellet Stoves, Pellet Fireplaces, Pellet Furnaces' started by don2222, Feb 9, 2025 at 6:53 PM.

  1. don2222

    don2222

    Joined:
    Nov 10, 2013
    Messages:
    3,322
    Likes Received:
    4,581
    Location:
    Salem NH
    Hello
    I do this on my old Harman P61 but it is needed for other old models too
    The stove would just feed less pellets and then shut down after an hour or so.
    It turns out that the old control board would not show any status error but fortunately the new 3 knob control panel shows the six blinks error!
    The problem symptoms are the auger slide plate and the auger itself gets a lot of black creasote on it and there is a very bad “Acrid Smoke House” smell plus there can be yellow brownish residue at the bottom of the hopper!! Also this problem is more severe and noticeable on the lower BTU Harman models.
    Therefore I pulled the auger and slide plate to clean them up and put in the Harman Feeder air crossover tube kit! This keeps the auger much cleaner especially on the lower BTU stoves. It seeems that the Harman Advance and smaller stoves greatly benefit but it can be installed on all models and all the new stoves seem to have these days!!
    Drilling the 25/64" holes in the right place was tough since it has to clear the arm that moves the slide plate. Then getting the brass flanges in from the inside was even harder! The red wire with a bend at the end to hold the brass mounting flange did the trick!! Then using a wire tie I made it even further away from the slide plate arm!
    The 5 amp inline fuse will blow if the igniter shorts and dies. If that happens it keeps the circuit board fuse from blowing and the stove can still be started with gel in the manual mode until the igniter is replaced!!
    Test mode was used to check the blowers, auger motor and vacuum switch. Then we fired it in Stove mode to check the Igniter and the ESP probe. When the stove got up to 135 degrees the distribution Blower came on!
    All done - Amen!!
    See pics

    Pic 1 - shows kit with high temp silicone tubing and 2 tubular brass mounting flange.
    Pic 2 - Red wire pulls in brass mounting flange in air inlet hole with damper open and out mounting hole drilled with 25/64" drill bit!!
    Pic 3- After putting some high temp silicone on the brass mounting tube before pulling it into the hole, more high temp silicone was applied to the outside and the hose was slid on the brass tube so it could all harden up good and strong.
    Pic 4 - Wiring is done and tied up with wire ties to keep the wires away from any heated parts!!!
    Pic 5 - Black inline fuse holder on the yellow igniter wire with a 5 amp fuse.
    Pic 6-7 -- it works -- all set!!
    8 - PDF File Of the Crossover Air Kit instructions for installation on older Harman Model Pellet Stoves.
     

    Attached Files:

    Last edited: Feb 9, 2025 at 10:02 PM