Freezing temps/ furnace suddenly quit

[Gbailey9099]

Hey all.

Perfecting timing while it’s supposed to drop to 15 tonight.
Got home from some errands and furnace was off. When I tried turning the thermostat off and back on the fan would blow and it wouldn’t even click like it was trying to ignite at first. After checking fuses and resetting the breaker a few times I got it to come on. It worked for about an hour (cycling on half a dozen times) then quit again.

I checked the sail switch which looked clean and good. I reset the board while I was out there. Came back inside, turned furnace on and on the third click it ignited. So how I have heat but am worried once it turns off it will not cycle back on.

Looking for both advice on how to keep it running tonight if possible. And wondering how to troubleshoot this for tomorrow.

My one worry and question if it could be the battery. I dewinterized about 2 weeks ago and had realized I never disconnected the battery. Everything’s been running fine but I wonder if that is likely the issue. I have a volt meter I can check it.