I too have a Northern Leader Wood Furnace 18-23 and am having trouble with the damper adjustment gadget on the front of the stove that one can turn to open or close the little damper below the woodbox and am hoping someone can help with what to do.
The problem is it's started sticking so the damper either is in full-blown open or it shuts down when it shouldn't.
The little knob is on a metal rod that goes through a spring coil then into the front of the stove. My guess is this metal coil, based on the amount of heat coming through the top of the stove and into the ventwork to the house, regulates itself by expanding or contracting which operates the chain up or down that goes to the damper. For some reason though the metal rod is sticking and not allowing things to work correctly.
I've used WD40 to clean the rod, coil and area around it and then used 3-1 oil on the spring, coil and rod as well to lubricate it.
The problem was discovered when I smelled HOT in the house and the damper was WIDE open which allowed the stove to very much overheat... That's when I stopped burning in it, cleaned and oiled it etc... but now the problem is the damper shutting and stiffling the fire when I"m wanting to get a roaring fire going.
ANY help would be greatly appreciated!! And US Stove was very helpful when I needed a thermodisc when mine burned out and the blower wouldn't stop blowing. That fixed the problem and the blower is working beautifully now!
I would LOVE to find an old owners manual if anyone out there has one! :o)
Have checked Northern Tool - they did not take over Northern Leader and it appears Northern Leader just plain stopped business instead of selling to another company or new owner so if anyone knows where these stoves or stove parts can be located I'd greatly appreciate your help!
M. F. in Nebraska