The worm gear on the limit switch of my Sears garage door opener will not stay engaged to the gear.
I have a Sears garage door opener model no. 41a4315-7d that suddenly will not open the door. When I released the door I saw that the rail coupling was driving in the wrong direction (with the door closed the coupling drove to close the door and stressed the rail. After removing the cover, I found the the worm gears on the limit switch and main shaft would disengage leaving the limit switch in the down position. How difficult a repair is this? If I manually reset the limit switch position and temporarily put a wedge in to put lateral pressure on the limit switch gear everything works okay. Not sure if I make this permanent whether this will create other problems. Thanks in advance for any inputs.
Jimmy k
Expert
The parts in the limit switch are not replaceable. You replace the limit switch as an assembly. It is not a difficult repair.
Just be sure the position of the center contact is in the same position as the trolley then adjust the up and down travel to fine tune the new switch.The part number for the limit switch is 41D3452 and the price is around $20.00.Join this conversation.
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