I went to turn on the furnace for the first time this year and it won't work. I opened the cellar door turned on the switch then turned on the thermostat in the kitchen no lights. What could be wrong? There should be a green and red light. They don't come on. I'm cold and the kids are cold. I can't afford to have a repair man fix it. I would like to fix it myself. Anyone have an idea of what could be wrong?