Garage door motor cycling
I have a Sears 1/2HP garage door opener that I replace the worn out plastic gear. When I tested it the motor turn on and then reverses and then stop this happens in about 5 seconds. Anybody knows what is happening? I remember removing the motor and inserting the plastic gear in the motor shaft and then reinstall the motor. Did I screw up in reinstalling the motor in its housing? I hope you guys can help me before I buy a new garage door opener.