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

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I have a Chamberlain LiftMaster Residential Garage Door Opener Chain Drive 2255. It no longer opens or closes. When you hit the button it makes a churning noise then stops. There is a code flashing on the learn button. Flashes 5X then repeats the sequence. According to the manual "Motor overheated or possible RPM sensor failure. Unplug to reset." I have done this without success.

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Remove the cover from the motor unit and check the drive gear. It is a white nylon gear just in front of the motor and is probably stripped. The part number is 41A2817.

Posted on Sep 07, 2010

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Posted on Jan 02, 2017

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With my door closed, i push door button to open and the chain and opener continues inthe closing mode. any help?


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    Liftmaster Gear And Sprocket Kit 41c4220a Chamberlain ...

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    Searsmore info. + -. Chamberlain LiftMaster 41C4220A Gear & Sprocket Assembly Kit. $31.40 ... Chamberlain Sears Craftsman Liftmaster 41A2817 Gear Kit. $27.65 ...

Jan 10, 2016 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Sears troubleshooting


craftsman garage door openers are made by chamberlain.. Give them a call on their 800 number with your craftsman model number and they will help you

Aug 23, 2014 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

HI, AFTER REPLACEING PLASTIC GEARS IN SAERS GARAGE DOOR O[ENER, OPENER WILL NOT GO THROUGH COMPLETE CYCLE. WHEN BUTTON PUSHED TO OPEN, OPENER GOES INTO CLOSE CYCLE AND HITS STOP BOLT. ATTEMPTED TO ADJUST...


Loosen the chain enough so that you can remove it from the sprocket above the motor unit. With the door closed run the motor until the sprocket turns clockwise and stops. With everything attached replace and tighten the chain. Some adjusting of the up and down limits will probably be required.


Mar 28, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

How/where do you lube a 10 year old 1/2 HP Chamberlain garage door opener to make it run quieter?


First thing you need to do is determine if it is the opener or the door that is making all that noise. The door is usually the culprit and you can lubricate the roller bearings and each pivot point of the door with silicone spray. Do not use grease and do not lubricate the channels that the rollers roll in. Some WD40 on the springs will help them live longer. The only place to lubricate the opener is the rail if it is a chain drive. Use lubri-plate on it. The screw of a Chamberlain screw drive opener does not require lubricant.

Dec 27, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

How do I tighten sagging garage door chain?


I think you have more problems than just a sagging chain. It is most likely sagging because the bronze bushing at the gear and sprocket assembly is bad. It lets the sprocket lean forward and loosens the chain. You will also need to remove the cover from the motor unit and check the drive gear. It is a white gear just in front of the motor and is most likely stripped.

Jul 13, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Sears Craftsman Garage door opener does not open or close


The drive gear is most likely stripped. It is a white nylon gear just in front of the motor. The parts number is 41A2817 and is available from Sears or any good door opener service company. It comes with instructions.

Jun 03, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My Liftmaster garage opener won't go up, only down. It's not bound mechanically. I just replaced the shaft assembly because the old one broke. But since I've done that the garage only goes down, it won't...


BE SURE YOU HAVE THE CHAIN/BELT INSTALLED PROPERLY.
IF THE DRIVE IS AT OR NEAR THE UP LIMIT SWITCH THE DOOR CAN'T GO UP.
LOOSEN & REMOVE THE CHAIN/BELT.
TRY RUNNING THE OPENER TO BOTH LIMITS - JUST TO SEE IF IT WORKS.
RUN THE OPENER TO THE DOWN LIMIT.
MOVE THE TROLLEY TO THE CLOSED POSITION - RECONNECT CHAIN/BELT.
HOPE THIS HELPS

Mar 31, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door Opener for 16 ft. door.


Sears sells RAIL EXTENDER KITS for most of thir GDO'S, mostly for residential applications. Go to www.SEARS.com, type GARAGE DOOR OPENERS in the SEARCH box. The first item that comes up is a 10 foot long GDO extension , item #00953727000, mfr model #53727.

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

1 Answer

Garage door opener problem


If the safety eyes are not connected you need to ho;d the button down until it reaches the close linit.

Feb 19, 2008 | Sears Craftsman LiftMaster Chamberlain...

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