I have a Goodall LP gas furnace, I think its 92% efficient. Last night (May 31,12) we had 42 degrees. So I decide to warm the place up a few degrees, adjust thermostat up, and no heat. I went down to the furnace, it was buzzing or humming. I looked in the little round window and there was no fire. The air conditioner and blower motor work. So did the flame igniter fail? What is wrong with it? If it matters my LP tank is 45% full, 500 gallon tank. Thanks for the help.