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

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Craftsman Model 139.53919 Door adjustment stop level broken

I have Craftsman Model an garage door opener model 139.53919 with the battery back up. I reset the pin for the out side mounted remote opening box. Since then the garage door does not stop closing, it keeps trying to close and the bar bows up it is pressing down so hard. I checked the safety protocall that is supposed to stop of something in the way. That does not work either. I just keep pushing down. I spend over an hour with the instruction manual trying to set the up and down level. IT will not accept the programming, and my garage clicker for the car no longer helps... any ideas?

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Because you had just changed the PIN for the keypad I would remove the battery in it and see if that makes a difference. It's a wild leap I know but.
If that doesn't change anything I think your logic board has failed.

Posted on Feb 04, 2010

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3 Answers

GARAGE DOOR OPENER REMOTE ONLY WORKS IN GARAGE WILL NOT WORK IN DRIVE WAY


1st, try replacing the battery in the remote. If that doesn't work, you will need to replace the logic board on the opener, which is typical in the craftsman openers.

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COULD BE A BROKEN SPRING
COULD BE A SENSITIVITY ADJUSTMENT.

HOW DOES THE DOOR WORK MANUALLY - IF YOU CAN'T LIFT IT NEITHER CAN THE OPENER.

ALSO COULD BE BAD DRIVE GEARS - BUT MOST OFTEN A SPRING 2ND WOULD BE OPERATOR ADJUSTMENT

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1 Answer

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YOU COULD HAVE THE WRONG SPRING OR NOT ADJUSTED PROPERLY. YOU COULD HAVE AN OPERATOR ADJUSTMENT PROBLEM.

HOW DOES THE DOOR WORK MANUALLY??

IF IT IS HARD TO PUSH DOWN AT THE BOTTOM - SPRING PROBLEM - IF IT WORKS AND CLOSES VERY SMOOTHLU AND EASILY THEN YOU COULD ADJUST THE DOWN SENSITIVITY - JUST A LITTLE.

Jun 19, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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Refer to your owners manual to adjust the travel limits to stop the door opening too high

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