Ignitor will not shut off - Harman PB 105

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Streamtracker

New Member
Oct 13, 2014
1
Sunderland, MA USA
1) Fire lites
2) Combustion fan running
3) Pellets fed at 4.5
4) Ignitor will not turn off even when water temp has reach 150 F.
5) After 40 minutes the furnace turns off.

Ignitor works, but the system does not recognize the fire is burning.

Update: The burn pot has a bubble and some cracks. Maybe part of the problem?
 
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Just as Andrew said - check your ESP. I usually clean mine with a toothbrush. If that doesn't clean it up, I use a small brass brush.

The ESP is a thermocouple that senses the exhaust temperatures.
 
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