Harman P61-2

[JulesDeLeo]

Hey all, looking for some guidance on what else to check. Harman P61-2.

Stove was running fine overall, but the last time it ran it was noticeably louder than usual. I shut it down, and after about an hour the combustion blower still hadn’t turned off, even though the stove was cold. I ended up unplugging it.

Because of that, I did a full deep clean before trying again:

• Shop-vac’d the entire firebox
• Scraped all ash and vacuumed thoroughly
• Cleaned the exhaust flapper / damper lever area in the ash pan section at the back bottom of the stove
• Removed and cleaned the fine particle / fines chamber
• Took the back panel off and cleaned a bunch of cobwebs and dust around the exhaust and blower area

After reassembling and trying to run it again:

• No auger feed
• Feed motor light does not come on in test mode
• Combustion blower again would not shut off, even after the stove was completely cold
• Had to unplug it to stop the blower

Once everything cooled, I pulled the back panel again:

• Checked wiring connections, nothing obviously loose
• Found the ESP probe, pulled it out, it was pretty black
• Cleaned the ESP probe and reinstalled it securely

After that, same behavior:

• Combustion blower still runs continuously
• Feed motor still not enabled in test mode

At this point I’m wondering what else I should be checking before throwing parts at it. Vacuum switch? Vacuum hose or nipple clog? ESP probe itself bad even after cleaning? Something else I’m missing?

Appreciate any ideas on next logical things to test. Just trying to be methodical here.

Thanks in advance.

 

[jackman]

First I would disconnect the feed motor and attach a test lead directly to it and see if the feed motor is working on its own. Then make sure that the auger can turn freely. If those pass then I would continue troubleshooting.

 

[Whitenuckler]

Hey all, looking for some guidance on what else to check. Harman P61-2.

Stove was running fine overall, but the last time it ran it was noticeably louder than usual. I shut it down, and after about an hour the combustion blower still hadn’t turned off, even though the stove was cold. I ended up unplugging it.

Because of that, I did a full deep clean before trying again:

• Shop-vac’d the entire firebox
• Scraped all ash and vacuumed thoroughly
• Cleaned the exhaust flapper / damper lever area in the ash pan section at the back bottom of the stove
• Removed and cleaned the fine particle / fines chamber
• Took the back panel off and cleaned a bunch of cobwebs and dust around the exhaust and blower area

After reassembling and trying to run it again:

• No auger feed
• Feed motor light does not come on in test mode
• Combustion blower again would not shut off, even after the stove was completely cold
• Had to unplug it to stop the blower

Once everything cooled, I pulled the back panel again:

• Checked wiring connections, nothing obviously loose
• Found the ESP probe, pulled it out, it was pretty black
• Cleaned the ESP probe and reinstalled it securely

After that, same behavior:

• Combustion blower still runs continuously
• Feed motor still not enabled in test mode

At this point I’m wondering what else I should be checking before throwing parts at it. Vacuum switch? Vacuum hose or nipple clog? ESP probe itself bad even after cleaning? Something else I’m missing?

Appreciate any ideas on next logical things to test. Just trying to be methodical here.

Thanks in advance.

If the feed motor light does not come on when trying to run you, could have a vacuum problem. I'd do all the basic checks and jumper the vacuum switch JUST for a test run. If it runs, then you would check the stove vacuum, the switch ect.

 

[Washed-Up]

When you say you checked the connections do you mean to the components? Sometimes the plugs to the control board come loose and can cause similar issues…if that doesn’t do the trick you may have to pull the board and check for burnt spots on the board itself