My Craftsman 1/2HP garage door opener only runs in the clockwise
direction. It won't close the door, it just tightens the chain towards
the open position. I managed to removed the chain, and the gear still
only runs clockwise. I don't see any damage inside the housing. How
can I get it to run counter-clockwise again to close the door? What
mechanism is supposed to make it reverse?
Sounds like you need a new garage door opener. Actually, the problem
is probably something simple, like a blown H-bridge (or power
transistor or triac...whatever controls the motor). But the work
involved in fixing this - assuming that you know what to do and have
the part and a soldering iron - is more than the cost of a new opener.
Sounds like the "Center Limit Contact" came loose from the limit switch
assembly's center drive screw. You should be able to clean up the drive
screw and pop the contact back into place. Check the assembly for wear if
you need to replace it, the part number is 41D3452
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