Freezing cold and the furnace goes on the fritz!

In what is likely to be one of the coldest, if not THE coldest day of the year and my furnace decides to start acting up. Not like I don't have anything better worry about. And I'm just about to leave town for the next 24 hours. And it's -2 degrees, and the projected high for the day is -1.

The furnace would come on, run for 10-20 seconds, and then shut off. 30 seconds later it would do this again. Never actually reaching the point the fan would kick in and start cycling warm air through the house. It was getting cold in here (which is how I noticed the furnace wasn't running right). After a bit of checking, eyeballing a few things and some trouble shooting I ascertained that our thermostat needed new batteries.

Thankfully, I had 2, and ONLY 2, spare AA batteries in my office. So we have heat!

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