Well, believe it or not, after reading some posts I decided to try something. I read that you could sometimes bang the unit a bit and get it to light off. I figured what did I have to lose, right? So I turned the thermostat up and I heard the click sound and nothing. Then I slapped the unit on the left side a coulple of licks. then I heard it rumble and start up. Amazing. Who would have thought that if something doesn't work. Smack it around a little and it would work for you like an old Burrow? Hee Hee. Anyway, It shut off after a minute or two and I cranked up the thermostat a little more and it fired back up again. I let it run for 5 minutes or so and then I cut it off. Sounds like my sail switch was stuck or something. Any ideas on this?