Question from user PoliticalChess4 at hvacadvice at reddit.com.

Answer:

the small hose that travels from the draft inducer to the top of the drain trap should not be looped like that, and needs to be cut shorter. a little bit of water stuck in that tube will cause a e09 fault. also the furnace drain should be vented to help prevent this as well.

Answer from user Supriselobotomy at hvacadvice at reddit.com.

furnace burner not staying on after power outage