Got my first heating bill back for December, 300 bucks, OUCH! is that typical? I'm in SE Michigan.
Here is my question though. When the furnace cycles on, it starts up normally, and runs fine, hot air at the vents ect. however, when the gas shuts of mid cycle and the blower fan continues to run, the furnace makes a clicking noise kind of like the sound that old baseball cards made when put in the spokes of your bike. this clicking slows down, and then stops, all the while the blower fan continues to run without making a sound.
I opened the main panel of the furnace, and it looks like there is a second smaller electric fan in there? The furnace vents thru a 4 or maybe 5 inch steel pipe up the chimney. Its sounds to me like there is a second fan (or something else that is spinning) that runs when the gas is burning, and stops when the gas shuts off.
Thanks for your help