alright, so heres what its doing. the ignitor turns on and hums a while like it always does, the burner kicks on, the fan turns on for a couple seconds, then it all shuts down and restarts and does it all over again. this happened continously untill i removed the thermostat, figuring that could be the problem, saw nthing obvious then re-installed it. the furnace ran fine until it reached 68 degrees, where it was set. then it wouldnt turn back on untill i turned the switch off and then back on again, then it went back to the original problem. could this be a bad thermostat? help! i cant imagine what it will cost to have a repair man come out on new years eve!