If the door does not properly reverse on striking the 2 4 then the garage door opener should be disengaged until the unit is either adjusted according to the instructions in the owners manual repaired or replaced with a new garage door opener.
Garage door beam does not reverse door direction.
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Craftsman garage door opener does not reverse direction.
If the garage door only travels down an inch or so before reversing something is probably blocking the beam between the two safety sensors at the bottom of the rails or the sensors aren t aligned.
Photo eyes or safety sensors are mounted to the track on either side of the garage door about 6 inches up from the ground.
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This is almost always the result of a dirty or obstructed safety feature.
It goes partway down reverses direction and goes back up again.
Replace them if they re broken.
You push the button to close the garage door.
It went up ok but does not return down.