Hey everybody, need some guidance. I tried my trailer furnace for the first time this winter (in Florida). The fan comes on, the furnace tries to light about three times then locks out until I turn the thermostat off and back on to heat, then it does it again. Will not stay running. it did this a little bit last winter but finally worked ok. Won't work this time. What do you think it might be? How do you fix it? Remember, I am not the smartest cookie on the sheet so simple instructions might go a long way. tks to whomever responds. BTW, I do have a couple small 1500 watt electric space heaters that are woking just fine, but still would like to get the furnace working the way it is suppose too.