I recently figured out that the actuator for controlling temp has gone bad. I've done research and have figured out where it is and how to fix it. While I was checking it out I noticed another broken piece. It is a piece of nylon that hooks into a metal arm that is connected to a diaphragm. I figure this is why I also cannot select where the air flow is going. I can't find any info on how to replace that part. It doesn't look as easy to get to as the actuator. I tried to pry the white nylon piece off but, no go. Any one done this before?