Ok, so now I will post some photos and discussion of my ongoing Uhaul furnace
First the thank yous: Thanks to Karen W for sending me her old furnace
for shipping only, and to Roy in TO for convincing me to come to the Niagara NOG, and to Mike S who at Niagara actually showed me how to pull out the furnace
and advised me what to work on next (sorry I didn't bring the spare furnace to Niagara Mike, I honestly didn't imagine that anyone would really want to help me try to fix it!)
furnace is a Duotherm something or other. It is self igniting. Mine would ignite - light
up for about 5 seconds and then die. I tried burning the stove to get rid of oxygen
in the line - still the same. We tried a bunch of other things, still the same, read the manual.... got confused.
Once Mike and I pulled the furnace apart and looked at what was happening he felt that the board was likely the problem... so here is what I did to replace it.
First you need to get to the furnace. On the inside of the camper you need to pull off the trimlock surrounding the cutout and open up the access panel next to the furnace (mine just has a piece of plain fiberglass covering a hole on the side of the furnace). Then you pull the brown cover off the furnace. If you look at the picture of the back of it you might see the two clips on either side of the grate that clip onto the front furnace edge. On mine I actually had to slightly loosen the outside screws holding the vent cover so I could push the furnace back a bit, then pull off the cover and wiggle it out.