Craftsman Garage Door Problem
I have a 53920 opener I had to replace the main gear. I purchased the kit with all new parts. When I started the project the door was closed. I removed the chain and all other parts to do the repair. After replacing everything I tried to open the door and the motor almost took the unit off the mounting bracket. I took the chain off again and when I press control the motor turns but will not stop. The stop switch is making contact but the motor continues to turn taking the stop switch past the shut off point.