When the door reverses before it even hits the floor this is often because the close force setting needs adjustment.
Garage door opener motor direction.
Craftsman garage door opener does not reverse direction.
When the opener is activated the screw rotates causing the nut to move until it reaches the switch.
Sometimes the limit switch is activated by the movement of a specially shaped nut traveling on this track.
If the bottom plastic piece on the gear was not put on it will only move in one direction.
As the motor cannot determine where it is within it s limits without it.
Important safety feature 1.
I have checked that there is power to the opener and that is not the problem however if i tap the underside of the opener motor with a stick the unit lights up and the.
Answered by a verified home improvement expert.
The motor is trying to work but something is binding.
The first line of defense is the opener motor which senses resistance and reverses direction if a certain level of resistance is achieved.
It went up ok but does not return down.
I have a 1 2 hp craftsman garage door opener that is about 20 years old.
A humming noise typically means that the opener is stuck or the door is stuck binding.
Garage door only travels a little way and then reverses does your garage door only travel a little way 6 inches or so and then reverse.
If an excessive amount of pressure is required to cause the door opener to reverse the reversing mechanism is considered inoperative.
Recently the wall switch that powers opening and closing is not lit and will not activate the opener.
Could be wiring or bad sensors if that doesn t fix it since your new gear was put in.
Garage door openers have an adjustment screw that controls the closing force the pressure with which a door is allowed to descend before the motor switches off.