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

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My sears 3500 gnerator will run for about 20-30 seconds then shut down what can I do?

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Check your fuel line and filter and make sure there is oil in the crank some have a safety cut off installed.

Posted on Sep 25, 2008

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Where can i find a manual for craftman garge door?


Probably needs an adjustment. I would check Sears website as they have lots of info there for products they sell. An operators manual should give you this info.

Jul 21, 2014 | Sears Craftsman LiftMaster Chamberlain...

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I have a sears Craftsman door and the door goes down and up but at times it will just stop and Light will go off and lights on sensors and opener will go off as well like the whole thing lost power. After...


This condition sounds like a safety sensor it tripping, based on the blinking lights. Check the IR sensor for alignment, at base of tracks, near floor, then re adjust the load sensors, both down and up. the down one sounds like it may be slightly too sensitive...

Jul 14, 2011 | Sears Craftsman LiftMaster Chamberlain...

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WHEN I press button for door to go down, it starts and a fraction of a second shuts down and the light blinks on and off for 5 seconds. When i disconect the release, it does not appear to be binding in any...


Anytime the main light flashes 10 times and the door reverses to the open position it is a door sensor problem. Make sure the door sensors are not loose so that they move when the door is closing, nothing is in between the sensors and the lens on each one is clean. Make sure all the wires on the back of the motor unit are snug at the terminals.

Oct 24, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Belt drive sears opener, new, will only open halfway, why?


Depending on model there are 2 two controls for up/ down travel of the opener. This is known as the limit switch. When the opener runs a gear moves 1 switch at time and when the switch closes the motor shuts off.There are arrows next to each control which will tell you which way to turn knob to increase the travel.if already maxed out will will need to remove cover and look at the switches. You can remove the tiny gear clip, take off the gear and manually move it in to the position you need. good luck

Jul 04, 2010 | Sears Craftsman LiftMaster Chamberlain...

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Liftmaster pro 1/2 hp wont shut in one button press


You have a door sensor problem. Either your main light bulb is burned out or you don't have one in your opener. The clicking sound you hear is the relay for the light. Both of the door sensors should have a small light that is lit. Tweak them until they are.

Jun 28, 2009 | Sears Craftsman LiftMaster Chamberlain...

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Garage door keeps running after it is shut


to tell you how to fix this is tricky your limit switch is not working, if it is a liftmaster, or sears craftsman take the cover down, if it is a older allistar it is a dog limit on the chain, if a genie check the cherry switch in back of operator behind cover.

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

1 Answer

25 yr+ old Sears opener runs past lower limit


Update: I remembered that I had a problem with the door reversing too much a while back. It was chattering in the tracks and I could not fix it with lubrication and changing spring tension. So I dialed up the down reversing force. This contributed to the jam-up I had when the lower limit was ignored. If I had a lighter force, it may have at least reversed.

After futzing with it I left it alone for several hours. The motor would hum every few minutes. I was considering cutting power to it overnight. I pressed the remote one more time and the motor ran normally to a limit and stopped. I tested it a few times then reconnected the chain and door. Seems fine now. I suspect an intermitten logic board problem. I'll try lightening up the down force and using it for a while.

Jan 06, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Liftmaster Model 976LM


can you program your remote for another chanel on this remote?
or do you have a second remote to try with?

Jul 28, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Sears craftsman garage door opener


HOLDING DOWN THE WALL BUTTON OVERRIDES THE SAFETY EYES.
WHEN HOLDING IT DOWN MAKES THE DOOR CLOSE PROPERLY THE PROBLEM IS IN THE SAFETY EYES.

ARE BOTH LEDS ON? - CHECK FOR A LOOSE OR BROKEN WIRE.
ARE THE EYES WIRED CORRECTLY?
ARE THEY AIMED AT EACH OTHER?

Jul 13, 2008 | Sears Craftsman LiftMaster Chamberlain...

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