Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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I have replaced the gears system in my craftsman 1/2 hp garage door opener. I pushed the button to test the motor and it went up without a hitch. I then went to push the button again and the door went down a foot and the motor kicked it back up. Ten times later, the same thing continued to happen. Nothing looks dislodged or broken and the chain is tight. Please advise...

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Can you adjust the down-travel? On mine, it's a white nylon screw, on the left side, inside the light cover. Seems like there were instructions for this adjustment in the instructions for the gear replacement.

Posted on Dec 07, 2008

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