On a recent bird hunting trip I couldn't get the furnace to light. Turn on the therm. and the fan would run but it just would not ignite. When I got home I opened it up and checked all the usual suspects but to avail. Then removed the thermostat and held the two wires together and it fired every time. simple fix, replaced thermo with new one, $20.00 from local r/v dealer and boom I'm back in from the cold. Good thing because I've got a couple of high altitude cold weather hunts coming up at the end of the month. Sometimes it's the simple things that will get-cha. Furnace is a 1995 suburban dd17dsi with the original suburban thermostat. Dealer says these thermos were not that good to begin with and was suprised it lasted this long. Hope everyone is well. SEE YA OUT THERE!