PF100 Temp Control Problem and Now No Feed

Hello, maybe you guys may be able to help with this. Here is what I have going on. The past few days I had the Harman PF100 pellet furnace going and it seemed to be running ok, but temp control did not seem to work with thermistor on wall or in service mode, it stayed steady at 72-73 degrees regardless of what it was set at. So I shut it down cleaned the inside and cleaned the ESP sensor. I fired it back up and it ran fine pretty close to the temp I had set, I thought great, maybe I fixed it. So I go downstairs to check on it and it was reading a 6 blink code and basically shutting itself down. When it cooled down I checked the burn pot and there was a bunch of ash in the burn pot. I cleaned all that out and it appeared all ok. So I lit it up again, and I noticed the feed auger was not running and you can see on the control that feed was lit up and would cycle like normal on and off every so often but the auger would not actually run. I metered the input to the auger to see if it was actually getting power and it was not. So now it appears to not want to stay going at all. I run this in manual light mode. Any ideas what could cause this issue(s)? Thank you.

 

First of all, welcome to the forum.

There are some Harman furnace owners on the forum, and I'm sure they'll be along.

In the meantime, a shout out to our resident Harman expert Lousyweather to help out.

 

Welcome shawnman2
It could be the auger but with no power it leans towards a stop auger feed safety, time to figure which one or ones.

 

Hi guys, thank you. I figured I'd give you an update on what is happening. I believe the feed problem I had earlier is resolved due to incomplete combustion caused by lack of draft, which is why it got the 6 blink error code earlier which I think prevents feed.-I cleaned the combustion blower and found a bunch of holes clogged of ash in the fire pot which are all fixed now and runs a lot better. I had it running all day today and ran pretty good with no errors. However I still do not seem to have any temperature control as the unit will bring the house to about 72-73 no matter what you set it on the wall or in service mode. I did an experiment by changing it to service mode on the lowest setting of 1 for about 40 mins(probably a little more). Now the unit did get somewhat cooler, the fire was still pretty high. I imagine during this time, the fire should get pretty low by then. I don't think the problem is in the thermistors, to me it leads me to think the ESP senser may be at fault with registering incorrect fire temperatures which make it hard for it to regulate at the correct temperature. I don't think the control board is at fault since all functions on it seem to run ok, just with temperature control off. What do you guys think? Maybe as imacman mentioned, the Resident Harman expert, Lousyweather may have some insight. Thanks again guys.