In this video I troubleshoot and replace a failed Draft/Induction motor blower assembly on my Goodman high-efficiency furnace. The symptoms were, furnace powers on, buzzes loudly, no air movement, and diagnostic code on circuit board indicating “Pressure Switch Stuck Open”.
I’m not an HVAC professional, but this problem is fairly straightforward to diagnose and complete.
I intended this to be a more generalized troubleshooting and repair video so I don’t go into details of the fasteners or exact connections to make as they will be different on different furnaces. In general though, there will be electrical leads coming from the control board to the motor, a vacuum tube either attached to the draft motor blower housing or possibly to the exhaust pipe, and some sort of mechanical fastening of the motor to the furnace body. Take a picture before you start, disconnect all of them and pull out the old part. Put the new part in and reverse your steps for installation.
If you have this same furnace and need to replace this particular part, it can be found suprisingly on Amazon for a good price.
http://amzn.to/1nS4pVG
Shipping may take time though so if it’s cold and your furnace is down, you should probably get it local if you can find an HVAC / Motor & Pump place that will sell to the public.
If you have any questions about anything I’ve shown in the video feel free to ask below in the comments!
Also, I am aware that you could fairly easily tell that this was failed because the motor wasn’t spinning, but the confirmation I was getting with the temperature rise was that the controller board was actually providing power to the motor. It is possible that the circuit board could fail in such a way that while it “thinks” it’s powering the motor, the motor doesn’t see any power and doesn’t spin causing it to flag the pressure switch as stuck open. Seeing the temperature rise confirms that the board is powering the motor and it’s not spinning.
Fir Works 