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

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Our Chamberlain Elite has recently been popping up minutes after we have closed it. Once even tried to close by itself 5 minutes after opening. Any thoughts? Thanks, Ric

It is a 3585P

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  • Sears Master
  • 33,294 Answers

Someone in your area may have a Chamberlain Elite that is interfering with yours. Also, people with dishonest intentions may be working your neighborhood trying to find an easy way in for a visit. If you can do it, try changing your code but don't be surprised if the problems continue

Posted on Jan 08, 2013

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Posted on Jan 02, 2017

  • 3197 Answers

SOURCE: Garage Opener Model 3255 Chamberlain Lift Master

The most common cause of this problem is a bad wall control the wiring going to it. You can eliminate both temporarily by removing the wire at terminal 1 on the back of the motor unit. The wiring sometimes is shorted by the staples the installer uses. The wall control gets used a lot.

Posted on Jun 23, 2009

  • 2 Answers

SOURCE: My Chamberlain garage door wont stay closed. It

Doors (and whole houses) expand and contract with temperature. Check to make sure your photo-eyes (they are not lasers) are cleaned of spider webs, dirt, etc. Disconnect your door from your opener and make sure that it runs smoothly by hand. Make sure all fasteners are tight and lubricate hinges and rollers with a light household oil. (NOT WD40-it is a degreaser and will ruin the grease pack in your rollers eventually) Does the door only reverse during certain parts of the day when the weather is cold? The sun, during different parts of the year in either the evening or morning may be blocking the photo eyes for a brief period of time each day. If the problem is due to the temperature related expansion of the door or jambs(the house), then adjust your down (or up) sensitivity(or force) so the opener pushes harder to close(or pulls harder to open) the door. Do this in very small increments so that minimal force is used to push on the door, otherwise you may cause damage or injury. Remember to back off on the sensitivity when the weather warms. Never play with the springs or cables of the door or anything connected to them. They are under high tension and you will get hurt.

Posted on Dec 15, 2009

  • 3197 Answers

SOURCE: chamberlain 1265 garage door opener, tried to

On the side of the motor unit you will find the 'down limit control'. Using a small screwdriver turn this control in the same direction as the arrow printed on the cover. Some tweaking may be necessary to get it just right.

Posted on Oct 05, 2009

  • 3197 Answers

SOURCE: Chamberlain 1/2 HP garage opener main part

If the main light flashes 10 times you have a door sensor problem. Make sure the small light on each sensor is on and not flashing. Tweak them if necessary. If the main light does not flash then you can try increasing the down force just a bit. This is a control on the side of the motor unit where the small gray antenna hangs. If this doesn't work you probably have a bad IR sensor which is a small printed circuit board just in front of the motor.

Posted on May 11, 2010

swolfinor
  • 504 Answers

SOURCE: Chamberlain model 1100 wont close

I WOULD TRY DOWNLOADING THE MANUAL AT http://www.chamberlain-diy.com/pdfdocs/114A1902.PDF

IS THE UNIT STUCK AGAINST THE STOP BOLT ON THE RAIL??
IF IT IS THE INSTRUCTIONS TELL YOU HOW TO RELEASE IT.

HOPE THIS IS HELPFULL

Posted on May 29, 2010

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1 Answer

Liftmaster 1245 led blinks five time but door will not open


5 flashes of the LED is the code for "RPM sensor or motor overload." You can try unplugging the opener for about 15 minutes to see if it resets itself. Normally if it is the RPM sensor the motor will run for a few seconds and then turn off. Is the door not opening or not closing? Just checking to make sure.

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1 Answer

I can not close my my Chamberlain garage door. It tries to close, and reach the end, then somehow after a second pause it opens. sometimes, wait for 5 minutes, it closes normally. This happens only when...


It sounds like the door is closing just a little too far. It hits the garage floor and the safety reverses it to the open position. This can be intermittent. On the side of the motor unit you will find the 'down limit' adjustment. Turn this just a tad in the opposite direction of the arrow printed on the cover. Some tweaking may be necessary to get it just right.

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

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I have a Craftsman Model # 139.53664SRT that has worked great until recently. When I try to close the garage door by keypad or with remote, it will not allow me to do so unless I turn the light out once...


The first thing I would do is remove the light bulb from the socket and try the opener. I have a feeling the bulb itself is bad or there is some arcing in the socket. Try unplugging the opener and prying out on the center connector of the socket.

Apr 08, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

The motor runs but it only opens a few inches and slowly goes back down its a chamberlain whisper drive model HD900D


Hi. I have seen this before, although usually not from chamberlain garage door openers.

Pull the release cord that unlocks the door from the opener, and manually open the door ALL the way open.

Then lock back in place in the open position.

Then use automatic opener to shut door.

It will close very slowly, but should close all the way.

Then, open the door again using the remote, and the door will once again open slowly, this time it should open all the way.

Then close door with remote, and door should now close as it is supposed, with the proper speed.

The slow opening and shutting is the system position sensor resetting itself.

This is why your door is acting up.

I would also look up by the belt drive connects to the front of the garage door opening, to make sure there isn't any dirt, cobwebs, or other obstructions on the sensor that may cause it to re-close the way it does.

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My mom has a 1/2 hp chain opener that was installed in 2000 or so. It had recently begun overdriving both closing and opening (so button had to be pressed once to stop it). I tried adjusting the raise...


Remove the cover from the motor unit and you will see the limit switch assembly. If you watch the operation I think you will understand it and be able to adjust it properly.

Nov 30, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door will not stay closed. It raises


On the side of the motor unit you will find the 'down limit' control. Turn this in the opposite direction of the arrow printed on the cover. Some tweaking will probably be necessary.

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

1 Answer

Garage door opens/closes by neighbor


Your code may be teh same or close to you neighbors. I'd change to another code. Takes 5 minutes

Jul 19, 2009 | liftmaster Chamberlain Garage Door Opener...

1 Answer

Door will not stay closed


Remove the cover and take a look at the limit switch assembly. It pretty much snaps together and it sounds like a part has come loose.

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

1 Answer

Garage Master 1/3 HP 1997 Door Working, not responding to Remote


I have the exact same situation, except my model (139.53607) is older than yours and does not even have an LED. Remotes only works after after shop light goes off (5 minutes or so), but wall button works fine. Did call Sears Service and the tech told me the logic board is probably shot. Don't want to waste money on service call so I'll probably have to buy a completely new unit in the Spring and go through the winter without the use of a remote.

Jan 24, 2009 | Sears Craftsman LiftMaster Chamberlain...

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