Bryant furnace not working after changing filter yesterday -- help!

QUESTION:

I didn't realize that you should cut the power to the furnace before changing the filter. Now the heat doesn't work. I can turn on the fan manually at the furnace, but not from the thermostat.
I've tried just about everything, it seems, except calling a repair service. Is there something simple I'm missing?
What I've tried: resetting gas regulator, per instructions, including cycling the power to the furnace making sure covers are seated properly pressing the reset button on the flow valve inside changing batteries in the thermostat

ANSWER:

Is the filter inside the bottom of the furnace? The door switch on the buttom of the furnace may be keeping it off. It prevents it from sucking flue gas down the chimney when the blower compartment is open.
It also may be a blown low voltage fuse.
I never turn off the power to change the filter unless I have to open the unit to do it.


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