When I start it (on manual) the fans come on, it feeds the burn box with pellets, then the auger stops all fans shut down and the #2 & #3 lights blink simultaneously. From the time I push start until the lights start to blink and everything stops and the control board won't respond is about 45 -60 seconds. The pellets don't ignite. The ignitor is hot (presumably not for enough time to ignite).
The manual indicates this is a high limit switch problem. I've reset the switch, no change. By-passed the switch with a jumper, no change.
Now, Ive taken the stove outside and completely cleaned it (with brush, scraper, vacuum and an air compressor)- All ash traps, air intake path, exhaust path, behind the burn box, removed and cleaned both fans. The seals are in good repair. all doors and trap covers replaced and closed. I've by-passed the high limit switch, the vacuum switch, checked all the wiring connectors, cleaned the control board ground, ensured the control board is securely in place (fuse is good). I've checked the wires and voltage (at the switch and at the pin out on the control board) for the hi-limit, vacuum and proof of fire switches.
I took the proof of fire switch off and cleaned the contact area on the switch and fan.
I've by-passed the proof of fire switch. When I did this, It follows the same procedure as above except, the combustion/exhaust fan remains on after the #2 & #3 lights blink (and the auger stops and the ignitor no longer heats).
I have by passed the switches individually and simultaneously. I am at a loss as to what the problem is.
It does not seem to be completing a full start up cycle. But, since it drops pellets and the ignitor begins to heat, it has apparently passed the vacuum check. Then after approximately an additional 30 seconds it shuts down (minutes before the proof of fire check should occur).
Any suggestions are welcome. - Thank you
