So why did my furnace die? It froze!
The furnace has a dehumidifier. A hose that drains water runs from the dehumidifier to the outside of the house. We had a cold snap last night and some water in the hose froze. When the dehumidifier tried to pump more water out the hose, it tripped a safety and shut the furnace off.
Part 1 and Part 2 on a Sunday Afternoon....
4 days ago