Here is what I known: In the fall I started up my furnace and it worked fine, we have not used our furnace (as we have a wood burner) until yesterday wife turned the furnace on before she left the house when we got home the blower was running but there was no heat. I pulled the panels and there is no flame (auto light system-can not use a match). I also noticed my auto damper position light was not on when it fact the damper was open ( I moved damper manually and light still did not come on). My flue is clear, I pulled pipes to verify, and my filter was dirty but have since changed it. I checked breakers, and fuses that I could see- just the one that controls the blower--. I still do not have flame or heat. Carrier year built 1986 Natural gas Model (this is as its taken off the label) 58GS0752-8A 150 1088A03387 Auto damper is Johnson Controls Mizer M35BE-1 Any suggestions as to where I can start or what the problem can be before I invest in a service call?