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harman P61A distribution blower won't run in room temp mode

Post in 'The Pellet Mill - Pellet and Multifuel Stoves' started by Honda, Nov 27, 2012.

  1. Honda

    Honda Member

    Joined:
    Nov 28, 2009
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    Loc:
    New Brunswick, Canada
    Anyone know why my distribution blower will run in stove temp mode but not room temp mode in Auto. I rarely use room temp mode, almost always stove temp. It worked fine in room temp in the past, however, switched to room temp from stove temp for the first time this year, and the dist blower shut off. no dist blower light either in room temp mode. feed still runs. Temp setting #4-70 deg.

    thanks.

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  2. kinsmanstoves

    kinsmanstoves Minister of Fire

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    Kinsman, Oh 44428 Brookfield, Oh 44403
    Sounds like a board issue. I do not get into replacing parts on a board but I would look in this direction.

    Eric
  3. Honda

    Honda Member

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    that's what I was afraid of. Every other mode works fine, hopefully it stays that way!
  4. Honda

    Honda Member

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    New Brunswick, Canada
    Found 100k Pots on ebay in another thread, may have to try this. Looks like the room temp side of my POT could be bad? Also in stove temp it doesn't seem like the blower gets to max RPM, and the blower only has a couple of months use, essentially new. Maybe this is a sign of dead spots in the POT. I think the local radio shack would be able to replace the pots fairly easily for me. I don't want to have a complete failure when it gets really cold!
  5. Lousyweather

    Lousyweather Guest

    X2
  6. roadking88

    roadking88 Member

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    central Maine
    manual says you have to set the room temp mode to higher than 4 or 5 i believe to run the blower...
  7. Lousyweather

    Lousyweather Guest

    huh?
  8. Melissa220

    Melissa220 Feeling the Heat

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    central ME
    If you are looking at settings 1 through 7 to set your stove, you are looking at STOVE temp. Room temp is settings 50 through 90.

    If you run in stove temp/manual operation, the distribution blower will not run unless the stove temp is set at above 4. Stove temp/auto operation the dist fan will always run and the stove will not shut down until you run out of pellets.

    Edit: you also need to make sure your dist blower setting is correct on either stove or room
  9. Harman Lover 007

    Harman Lover 007 Minister of Fire

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    Look at you Melissa...giving out the Harman advice...you go girl!
    Melissa220 and DAKSY like this.
  10. Lousyweather

    Lousyweather Guest

    yep- in another few days, she'll be throwing in snide comments about "read your manual", "clean your stove", and "its spelled hArmAn!"

    she's a quick study
    Melissa220 and kinsmanstoves like this.
  11. Harman Lover 007

    Harman Lover 007 Minister of Fire

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    I'm fairly certain she's passed the initiation test here.....
  12. Northwoodneil

    Northwoodneil Feeling the Heat

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    I agree but did she put in her own OAK? I missed the end of that thread lol.
  13. subsailor

    subsailor Minister of Fire

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    I don't believe so. I think she's waiting until next spring.
  14. Melissa220

    Melissa220 Feeling the Heat

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    central ME
    Does it count if i just think it? Or is this similar to: If you don't see a picture, it didn't happen?
  15. Lousyweather

    Lousyweather Guest

    oh, no, Melissa.....thats what separates the men from the boys here....(or the girls from the women!)....you have to vociferously state what is on your mind, regardless of the feelings of the offending party....pointing out the error(s) of his/her ways, such that they may have a better pellet buring experience....so....no, you cant just "think it"....state it, loudly.....;)
  16. Don2222

    Don2222 Minister of Fire

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    7,032
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    Salem NH
    Hello

    There seems to be another case where the Distribution blower can be off in Room Temp mode!. This stove below has the newest circuit board so it may not be true for older circuit boards
    When running Room Temperature mode and the switch is in Auto, if the temperature of the room is just 2 Degrees above the set point on the stove (2 Degree upper Swing), the room blower in this case will turned off automatically only if the fire is at it's lowest setting! I did not see this happen on the colder days when the fire was ramped up! ! !

    Example:
    The fire was still going and the auger was still feeding pellets at the min rate in pic 1&2
    See Pic 1 -- Room Temp on Digital Thermom is 72 Deg F
    See Pic 2 -- Harman P61a-2 stove temp dial is set to 70 Deg F and only combustion blower LED is on and only the combustion blower is running.

    When I turned the temp dial up to 72.5, just above the room temp on digital thermometer, the distribution blower and it's LED came on!
    See Pic 3

    When I turned the temp dial on stove back down to 70, the room distribution blower and it's LED went off.
    See Pic 4 and notice the pellets are still feeding at a min rate becasue the auger feeder LED is on and I hear it still feeding.

    Note: If the stove temperature dial is set any lower than 70, the stove goes into shut down mode. Therefore it looks like a 2 degree bottom swing programmed into the chipset.

    Click on pics below to Enlarge and see slide show,

    Attached Files:

    Last edited: Apr 26, 2014
  17. railfanron

    railfanron Member

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    Perry MI
    My P43 operates pretty much like Don says. Something interesting, the convection fan can be running and the stove not calling for heat in room temp auto but if you switch to room temp manual the convection blower will immediately turn off. In manual mode it can run on low fire without the convection fan until it ramps up on a call for heat. This may be an hour or so. Basically the convection fan runs longer in auto mode than manual.
    Ron
  18. Don2222

    Don2222 Minister of Fire

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    Wow, that is interesting. I have not used manual mode much. I will have to try it.
  19. alternativeheat

    alternativeheat Minister of Fire

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    I run in manual all winter, in the spring I switched back over to auto. But I really wonder if the OP is in room temp at all. has that been cleared up yet, i read most of the posts and didn't see where it may have been verified.
  20. Harman Lover 007

    Harman Lover 007 Minister of Fire

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    That's called "low burn" or maintenance burn, it's described in your manual. Many of us run our stoves that way in the dead of winter. The distribution fan will stay off until the ESP senses 350 degrees, then it will come on.
    Interestingly, on newer Harmans, Stove Temp mode is now called Constant Burn mode on the control panel.
  21. TonyVideo

    TonyVideo New Member

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    Rushville, IN
    Remember in room temp mode it is designed to keep the room temp at the desired selected temp. If it is warmer than selected it will shut of the distribution blower. If the switch is in manual it will keep a maintenance fire going for quicker respond for more heat and will not shut down. If in auto mode and room temp is higher than selected then the stove will shut down. It is more obvious when first setting the temp. In auto it will extract as much heat as possible from the stove before shutting down as the fire dies down so than fan will stay on as the temp of the fire does down. In manual it just does a maintenance burn and waiting for the call for more heat and therefore can respond quicker so the fan shuts down and back on as needed.

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