I have a Goodman PGB030050-1 and the status light is flashing 3 LEDs, which corresponds to the code "END SWITCH CLOSED WITHOUT INDUCER ON". When I reset the breaker on the end switch, everything fires up and runs fine for a few hours, then shuts down with the same status light code. I have read posts where people advised cleaning the drain on the vent motor, but it appears this particular model (model B29590005) does not have a drain. Also, there are no obstructions to the "chimney" or in the motor itself. I'm not sure if I can replace the switch itself, or would the problem be with the motor or the ignition circuit board? Any advise would be great as we are freezing our tails off here! Thank you.