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I'm in the same boat. It got a little cool last night and I decided to start up the furnace. Everything seems fine, but it doesn't kick off on it's own. The furnace itself is about 50 years old, but I managed to wire it to a digital timed thermostat about three years ago. The thermostat seems to be working just fine. If I push the temperature setting up past the current ambient temperature, I hear a switch in the thermostat click. Usually I would also hear a matching click in the furnace as well and then the "whoosh" of the burner starting up. But that's what I'm not hearing this year. If I go down to the furnace, there is a button that I can depress and hold for 30 seconds which will start the furnace up. I did this last night and it did kick off to the point where the blower started when it's startup temperature was reached, but once the shutoff temperature was reached, the system was off again and didn't turn back on. Last year I had to have the thermocouple replaced, but that doesn't seem to be the problem this year. Anyone have any clues? I admit I am a total "newbie".
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