Carrier RTU induced draft motor fault

Carrier RTU was blinking 6 times indicating induced draft motor failure. L1 had voltage going in but no voltage was leaving the board so the previous technician diagnosed a bad board. I ended up changing the board and still had the issue. I decided to take the original board and plug it on the unit next to me and it fired immediately. I ended up calling tech support even though I knew the problem was right in my face but it was getting chilly 😆. It ended up being a pressure switch stuck closed. We all know the system won't start if the switch is closed but man this threw me off today. Carrier pressure switches sure aren't what they used to be.