Wow ask and ye shall receive.Thanks for the quick replies. I had searched for info on the net but only found bits and pieces of what I was looking for. This old heater has signs of never being lit, it comes on OK but the fan does not come on. Thanks for the links. Tiger4x4RV your link was just what I was looking for Thanks for everyone's input I'm trying to get my old girl up to par, the furnace was the only thing that wasn't working when I brought her home and the only thing that didn't have documentation go figure. again Thanks!!