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

1 Answer

Door openers gone haywire

3 car garage, with 3 doors. All of sudden my neighbors craftsmen openers open / close my doors. Can't reprogam openers . seems like all 3 units except any frequency. no new electronic devices in garage

Posted by on

  • marty metzger May 11, 2010

    Highly unlikely. How old are openers? New ones have 3 or 100 billion codes and change after each use. OLD units may have same code. Need more info.

×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Champion:

    An expert who has answered 200 questions.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

  • Expert
  • 244 Answers

Do not understand what you mean by can't reprogram openers, How old, Dip switches inside. Security plus. Need more info.

Posted on Jan 15, 2009

  • marty metzger Jan 19, 2009

    trade remote with neighbor.

×

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My 1/3 hp craftsmen door opener just hums when you hit the wall button or remotes in the car. I replaced the starter motor capacitor and nothing changed any ideas?


Is the door stuck in the open position? If so the trolley is probably jammed against the bolt just in front of the motor unit. Loosen the chain until the tension is removed from the trolley. Run the motor until the door is closed. While the door is closed locate the 'up limit' adjustment on the side of the motor unit and turn this 2 complete turns in the opposite direction of the arrow printed on the cover. Tighten the chain.

Dec 21, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I really need your help. My Craftsman unit model number is 139.53615SR manufactured 1/92. I have a three car garage. The original two remote controls were lost and since then I've used the setting in my...


Have your neighbor bring over his remote and open or close your door with it. Then hold the smart/learn button in for 6 seconds on your opener. Then see if he can open your door. He shouldn't be able to because that procedure erases the memory in your opener. No remotes should work. You need to get that remote #53778 back and program it and then see if your neighbor can open your door. If he can open your door at any point after you have held that button in for 6 seconds you need to get a new door opener.

Oct 25, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

HAVE A 1/3 HP CRAFTSMEN OPENER THAT WILL OPEN WITH THE REMOTE BUT NOT CLOSE MUST HOLD THE HARD WIRE BUTTON TO CLOSE. GREEN LIGHT IS FLASHING.


If the main light flashes 10 times and the door reverses to the open position you have a door sensor problem. Make sure they are pointed at one another and the small lights on each one is lit and not flickering. Tweak them to see if you can get the lights on. If not you have a sensor that has failed.

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

1 Answer

Craftsmen garage door is not opening. It started


Your drive gear must be stripped. Remove the cover and you will most likely find lots of what looks like white sawdust and a stripped gear. It is white nylon and is just in front of the motor. The part number is 41A2817 if you want to replace it and it comes with instructions. Available at any good door opener service company.

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

1 Answer

Craftsmen garage door won't open. 5 blinks and a pause on ind.


Most commonly this is caused by the trolley jamming against a bolt just in front of the motor unit. Remove the bolt and run the opener until the door closes. On the side of the motor unit you will find a control labeled 'up limit'. Turn this about 3 turns in the opposite direction of the arrow printed on the cover. Be sure to replace the bolt. Should do it for you.

Jun 22, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door opened by neighbor


Have you seen the neighbor open your door? The reason I ask is because it is almost impossible. The most common cause of a door opening by itself is a bad wall control or the wiring leading to it. You can temporarily eliminate both possibilities by removing the wire from terminal 1 at the rear of the motor unit. Do this and ask your neighbor to bring over his remote and try it on your opener.

Jun 11, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

New code entry does NOT override old code on Craftsman 315 keypad


yes. Press the learn button for 8 seconds to clear the remote memory. Reprogram all remotes and keypad

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

1 Answer

Door won't open or close


Check the connection on your limit assy. Many times people forget to reconnect this.

Jan 02, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Remote and Keypads open neighbors door


Hold down learn button for 8 seconds. This clears the memory for all remotes. Then reprogam your remotes

Oct 31, 2007 | Sears Craftsman LiftMaster Chamberlain...

Not finding what you are looking for?
Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+ Logo

156 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sears Garage Doors Experts

Al Clark

Level 2 Expert

290 Answers

Cindy Wells

Level 3 Expert

4759 Answers

Pieter Vleeshouwers

Level 3 Expert

1421 Answers

Are you a Sears Garage Door Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...