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

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Legacy garage door opener

I hear the motor go on but garage door does not operate.

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The belt which connects the motor to the door may be slipped, place it to the correct position.

Posted on Oct 22, 2008

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Garage door lift door mechanism maintenance


disconnect the motor and operate the door manually. check and adjust until it operates correctly. re-attatch the motor and check operation. provide a more detailed question if this does not help

Apr 09, 2014 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Unit has power, went up, won't go down. Pushed re set, still nothing. Can hear unit try to engage but will not operate


Check to see if the trolley is jammed against the bolt just in front of the motor housing. If it is you need to loosen the chain enough to release the tension and then run the opener until the door is closed.While the door is closed, locate the 'up limit' control on the side of the motor unit. Turn this 2 complete turns in the opposite direction of the arrow printed on the cover. Tighten the chain.

Apr 01, 2011 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

I had a lightening strike at my home. Since then, the garage door does not function with wall switch or remotes. when i press the switch, light comes ON on the door opener and i hear a click but nothing...


Well, I don't think that disconnecting the garage door from the garage door opener would affect function.

The lightning strike could have destroyed the circuitry inside the garage door opener, seeing that it won't operate with the wall switch or remotes.

It's likely that a board was fried by the lightning which would render the garage door inoperable.

Aug 08, 2010 | liftmaster Chamberlain Garage Door Opener...

1 Answer

Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+: when i push the wall unit i hear a click from the ...


Remove the cover from the motor unit and check the drive gear. It is a white nylon gear just in front of the motor. It may be going bad.

May 16, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My garage door hums but does not open. It had


Sounds like you have a bad start capacitor. It sits next to the motor and is about the diameter of a silver dollar and about 5 inches long. You can get one at any good door opener service company.

Feb 06, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have a liftmaster 1/2 hp garage door opener and when I push the remote and hear 2 clicks from the motor, and the led light flashes 5 times. I have unplugged it and the system resest, but then does the...


UNPLUG THE UNIT TO RESET
TRY TO OPERATE MOTOR. IF IT STILL FLASHES 5 TIMES AND THE MOTOR MOVES 5-6 INCHES, CHECK THE RPM SENSOR - A LITTLE CUP ON THE MOTOR SHAFT WITH A SENSOR.
IF MOTOR DOESN'T OPERATE AT ALL MOTOR MAY BE OVERHEATED - WAIT 30 MIN. & TRY AGAIN. IF THE MOTOR STILL DOESN'T MOVE IT IS MOST LIKEKY A BAD CIRCUIT BOARD.

Jan 21, 2010 | liftmaster Chamberlain Garage Door Opener...

1 Answer

Garage Door opener will not opern


2 flashes indicate safety eye issue. Check you wiring and make sure it is wired correctly and check to make sure the eyes are properly aligned.

Jan 23, 2009 | Sears Craftsman LiftMaster Chamberlain...

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