It's the big 0 °f outside this morning the past two days have been clear with some air movement and yesterday got up to 32°.
Yay furnace, I don't know if mine is belt drive or direct, but the flame sensor got "dirty" last year and the plumbing guy came out and removed it and cleaned the sensor rod with a dollar bill. The start of winter this season it once again wouldn't make heat, so I cleaned the sensor rod and it has worked since. I really should take it out this summer and go in search of a new one for backup if the dollar bill burnishing trick no longer works.