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