My turn....furnace crapped out last night.
The blink code on the control board indicates a pressure switch is open, but I think the switch is good....as I’ve replaced it with a known good spare.
The blower motor case is HOT! I’m thinking the logic circuit thinks the blower is running (when it’s actually not), and since the pressure switch hasn’t closed due to the vacuum in the plenum, it’s flagging a pressure sensor fault.
Turned off power to the furnace and let the motor cool down (shouldn’t take long...it’s 63° in here!!
I’m going to call a service guy on this one, as I don’t have quick access to a replacement blower motor.
At least I’m working from home today to deal with this one. Earlier in the week I was on a business trip, and my wife would have had to deal with this. She wouldn’t have been happy.
Edited to add: I let the blower motor cool down until it was cool to the touch. Powered on the furnace, I can hear the motor humming, but it doesn’t start. I think the motor is toast. Probably not going to be a cheap fix. Ugh