Thelin Gnome Need Help

[ConfusedandCold]

About a month or so ago my pellet feeder started backing up while the stove was running. It also felt like it wasn't blowing at full speed. Since it was still putting out heat and wasn't catching fire I put it out of mind. Came home after a long weekend vacation and immediately put on the stove to heat up my freezing house. came back down stairs and the unit was off with some pellets still burning. Tried it again today and same issue: unit turns on; igniter works; pellets feed; fan runs but pretty slowly; unit turns off after 10-20 minutes. When I put the unit in FAN mode it runs at high speed. I replaced the fan motor and brushes last winter. Any ideas? I'm pretty new to all this. Thanks!

 

[ConfusedandCold]

UPDATE

Tried to turn the unit on again. beginning fan function sounds inconsistent. Immediately switched it off. Fan made a whirring down noise. What would cause the fan to lose power or run in surges when it is in HI mode but run consistently when in FAN mode?

 

[johneh]

Sounds like the proof of fire switch or what ever your stove uses has gone the way of the doo doo
Or maybe it is just dirty

 

[ConfusedandCold]

Sounds like the proof of fire switch or what ever your stove uses has gone the way of the doo doo
Or maybe it is just dirty

Thanks John. Im wondering if its the T1 or T2 switch. Still scratching my head as to why the fan is working in FAN mode but struggling otherwise

 

[ConfusedandCold]

Heres something else. When you plug the unit in, the LED is supposed to light up and the fan is supposed to whir. Just unplugged and replugged. LED lights up but fan does not whir

 

[johneh]

Pull the combustion fan clean and test

 

[Mt Bob]

I would suspect you need brushes or a motor,but possibly a control board.