Blower works but no heat
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)
Auto damper is
Johnson Controls Mizer
Any suggestions as to where I can start or what the problem can be before I invest in a service call?