If its not one thing its another.
Our furnace is acting very peculiar - like..... no heat.
I have the thermostat set up to where it should be
constantly raging, and it doesn't respond.
Then about 10-20 mins later it'll suddenly go on..... for about 10-15 mins
then shuts off. Moving the thermostat back & forth from hi to lo doesn't
seem to have much effect. We've a call in to the repair center (annual contract)
and they're supposed to send someone, but they didn't say when.
We noticed this about 1 a.m. before going to bed last nite. The house wasn't
freezing when we woke, but it definitely was below normal temp. I guess it was cycling on & off enough during the nite, but it ain't acting normal.

Gotta dig my Astro Van out of the plowed-in snow tomorrow.
Fun & Games in the Chesapeake Bay Area !!