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

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Craftsman door opener

Just replace drive and worm gears and experiencing problem similar to bentomi and others...unit starts in one direction and reverses after 2 seconds until it hits the upper limit. Speed cup is set as far as it can go but problem persists. Any other suggestions?

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Did you align the chain or belt?? If not That would be the problem.

Look at the instructions that came with your gear kit. they have a detailed step by step proceedure.

If it's not the alignment it is probably a bad circuit board.

Hope this helps

Posted on Oct 05, 2010

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