3 Blinks Harman Accentra

[quickhitch11]

Hi all,
First time posting. I read through a lot of the forums, trying to find a little more info.
My Accentra is an older unit that didn't get much use by previous owner. This is our 3rd season using it.
I did a complete cleaning ( have roller rail kit to get it out of fireplace. Pulled all blowers, and cleaned, and it ran for the last few days ok. I tried to shut it down 2 nights ago, for chimney cleaning. It would not shut down. In off position on knob it continued to feed, no matter what.
So I remover pellets from hopper and let it run out. I had chimney cleaned, and then when I put it back, it came up with 3 blink code, and combustion fan and distribution fan come on as soon as it is plugged in. Again it's set to off. I replaced the ETP, and checked the vac switch. Open when off, and closes when combustion fan is on. Also isolated the room temp probe. No difference . So wondering if anyone has any suggestions short of me replacing the board.
Thanks in advance, Chris

 

[jackman]

According to my manual the 3 blink code is an ESP failure. Try unplugging and check it again. If it still happens I would replace it and see if that fixes it.

 

[quickhitch11]

According to my manual the 3 blink code is an ESP failure. Try unplugging and check it again. If it still happens I would replace it and see if that fixes it.

Thanks Jackman, I miss labeled, I did change the ESP. I called it a Exhaust Temp Probe by mistake. I ohmed both the new and old one, and at room temp they read exactly the same. But I installed the new one anyway. No change. And I unplugged the stove numerous times
No dice. Still the same. It will not shut down.

 

[Mt Bob]

Did you try turning all the knobs back and forth a few times, then back to off and see if something different happens?
If something does change, get some deoxit or other contact cleaner and clean the pots.

 

[jackman]

I'll second MtBob's suggestion. It could be dead spots on the potentiometers.

 

[quickhitch11]

Did you try turning all the knobs back and forth a few times, then back to off and see if something different happens?
If something does change, get some deoxit or other contact cleaner and clean the pots.

 

[quickhitch11]

Mt Bob,
I did move the pots all over a bunch, to no avail. However, I do have contact cleaner, safe for the boards. I'll try that this evening. Fingers crossed, otherwise it's gonna be board time I think.

 

[quickhitch11]

Mt Bob,
I did move the pots all over a bunch, to no avail. However, I do have contact cleaner, safe for the boards. I'll try that this evening. Fingers crossed, otherwise it's gonna be board time I think.

I brought the board to my local supplier. We ran it through some tests, and it is bad.
Installed and it is now running , and the girls are happy. Thanks for all the help!
Chris