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

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I have 2 Chamberlain Liftmaster Professional Formul 1 model 1280R garage door openers with light problems. on one, neither bulb lights and on the other other just one of the bulbs lights. Otherwise the door openers work fine. i have changed the bulbs multiple time and have determined it must be something inside. Is it possibl that the wires inside have overheated from the heat of the light bulbs? i have not taken it apart yet. it there is a way to repair it, get new light sockets, etc., just let me know. thanks, Francis Campion

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Unplug the openers and remove the light bulbs. Using a small screwdriver pull out on the center contact in the light socket.

Posted on Sep 28, 2010

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All my door openers r craftsmans with the orange smart buttons at the sears store they sold me one that on the package will work with green or gray does not say orange i wanted to find out before i open...


Compatible with Chamberlain LiftMaster Security+ 390MHz garage door openers with redish orange learn button manufactured from 1997-2005.

Temporary password option to let you give friends, relatives or maintenance people limited access. Program code directly from keypad.

Compatible with garage door opener operator model numbers 1240R, 1245R, 1246R, 1255R, 1256R, 1265, 1280R, 1000SDR, 2000SDR, 1245 GMR, 1255GMR

The 977LM is new version of 976LM.

Taken from Garage repair information

Jul 17, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I had a LiftMaster model 2000SDR. remote won't work when light is still on. Only wall control can operate garage door. Once lift is off, then remote control work. How to fix this problem?


Remove the bulb and try. The bulb or the socket may be radiating a signal. Unplug the opener and pull out on the center contact of the light socket. Try another bulb.

Feb 06, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I am having a problem with my Craftsman 1/2 HP garage door opener 139-53910. My light bulb does not come on when the garage door is opened or closed as it should. I don't have a manual. Is there a...


Make sure the bulb is good. Unplug the opener and remove the bulb. Use a small screwdriver to pry out on the center contact in the light socket. Replace the bulb and plug in the opener.

Dec 18, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Liftmaster 1/2 hp professional, all functions work except for lights, i have unplugged and replugged in, bulbs are new, contacts good. Any suggestions?


Unplug the opener and remove the bulb. Using a small screwdriver pull out on the center contact in the socket. Replace the bulb and plug in the opener.

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

2 Answers

I have a chamberlain liftmaster professional Formula 1 Garage door opener that has been working for 5 years. Now will not go down unless you hold the main button. Sensors blink when it hits within 3...


Anytime the main light flashes 10 times and the door reverses to the open position it is a door sensor problem. They each have a small light that should be lit, both should be the same brightness and not flickering ever so slightly. If not tweak them a bit. If both lights will not come on you have bad sensors.

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

1 Answer

Lights do not work on the garage door opener. what could be the problem?


Unplug the opener and remove the light bulb. Pull out on the center contact in the light socket. Replace the bulb and plug in the opener.

Jun 15, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Sears 1/2 horsepower garage door opener, both lights do not work. Changed bulbs, checked bulbs, both are good.


Unplug the unit and remove the light bulbs. Using a small screwdriver pull out on the center contact in the light socket.

Apr 12, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Sears 1/2 hsp garage door opener. Remote control will not close garage door until light goes out. what is problem ?


I would suspect you have a light bulb that is radiating and causing interference with the receiver. Remove the light bulb and try. You can also try this: Unplug the unit and using a small screwdriver pull out on the center connection in the light socket. This will tighten the connection and prevent arcing.

Feb 08, 2010 | Sears Craftsman LiftMaster Chamberlain...

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