[Scott Douglas]

Batteries are new as of yesterday. Blew it out with canned air too while I was in there.
Don't know if it's a single or multi stage furnace. It's got the A/C system integral to it and is a Carrier unit.
Yes, the thermostat is still calling for heat when it shuts down as it hasn't reached temp in the room according to its readout.
I cleaned the filter a couple weeks ago in anticipation of us using the heat more this winter. It was cleaned for A/C use which lasted until early Nov this year as we had some hot days.
I think the power outage we had recently might have messed with things, either in the t-stat or in the furnace itself.