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

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I have 2 craftsman 1/2HP garage door opener and the light on 1of the door pad is flickering constantly. The remote door openers does not work for 1 side but the touch pad does.Two of the sensor lights are green and two yellow.

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On the wall control that is flickering press and hold the lock button for 3 seconds. Should work now.

Posted on Apr 11, 2011

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Good Morning My name is Raj. I have a CRAFTSMAN Garage Door Opener 1/2 HP, model# 139.53635SRA (OR) T as the last letter. Issues: I cannot CLOSE Garage Door either with remotes or with key pad by...


If the main light flashes 10 times when the door reverses to the open position it is your door sensors. Make sure the small light on each one is lit and not flickering. Tweak them a little. If you cannot get both lights to come on you have bad sensors.

Sep 30, 2011 | Sears Craftsman LiftMaster Chamberlain...

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Ok so I am having a problem with craftsman garage door, The sensor light are right on green and one orange, but i still have to hold down the button in the garage to shut the door. Also today i thought...


If when you try to close the door the main light flashes 10 times and the door starts down and then reverses to the open position you have a door sensor problem. Make sure the lights in the sensors are not flickering ever so slightly. The color of the lights doesn't mean anything. The keypad sounds like a separate problem. Make sure the battery is good.

Apr 07, 2011 | Sears Craftsman LiftMaster Chamberlain...

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I have a liftmaster Model 1240. Door will open by remote or wall opener. The door will only close while holding wall opener button down. If i try and close via remote, light starts blinking and door...


The only thing that will cause the main light to flash 10 times and the door to reverse to the open position is a sensor problem. Make sure the light on each sensor is on and not flickering ever so slightly. Make sure they are not moving when the door starts to close. Lights on sensors should not blink. One light should stay on constantly and the other sensors light should go off when you block the sensors.

Jan 22, 2011 | Sears Craftsman LiftMaster Chamberlain...

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We bought a Craftsman 1/4 hp garage door opener. It came with a car remote and a push button. The push botton works fine to open and close the door. But the car remote will only open the door. What do...


If you didn't install the door sensors you must. If you did, make sure they are pointed at one another and the small light on each one is lit and not flickering. Tweak them a little.

Oct 28, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have a 1/2 hp craftsman opener. Remotes work fine. Wired wall unit has a blinking light on the open button and will not work Lock pad and light pad work but not the operate pad.????


Try pressing and holding the lock button for 3 seconds to stop the light from blinking. Your wall control may be bad. Usually when that light is blinking it is the remotes that will not work.

Jul 02, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftsman # 139.53879 -1/2 h.p. Door opener- problem re-programing remote unit. Garage door will open but not close using remote. Wall switch works fine to open & close.


Check your door sensors. They must be pointed directly at one another and the small light on each one must be lit and not flickering. If by tweaking them you can't get both lights to come on you may have a wiring problem or one of the sensors has quit working.

Apr 14, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Problems with door


Check your door sensors. Make sure the small light on each one is lit and not flickering ever so slightly. Tweak them a bit.

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

1 Answer

Replaced batteries.changed codes verified not in lock position checked wiring-checked breakers -remotes dont work have 2 different units-one commercial all stopped working on same day -need help


I have the Same Problem...
2 similar but independent 315MHz Craftsman door openers stopped receiving any remote signals at the exact same time. One hour they worked , next hour they didn't, no storms in area.

I know remotes are good because they still open our subdivision gate. the Only way to open door is with wall pad. Verified that they are not on vacation lock. 5 different remotes, 2 different keypads all no longer open door.
I tried resetting codes with learn button but they won't take new programming. Also before when an unlearned remote was used in the area, the learn light would at least flicker (as if it was receiveng a code, but rejecting it) It no longer even does that.
i even cycled the circuit breaker and the vacation lock, no help.

Does anyone know how to fix this?

Oct 25, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door won't open.


The most common cause of this problem is the door sensors have been bumped and misaligned. They each have a small light that should be lit and not flickering. Tweak them until they are pointed at one another and the lights are lit.

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

1 Answer

Remote doesn't work!!!


You could try to replace batteries. May be they are stong enough to make the LED flicker, but not strong enough to send out a proper signal to the receiver.

Mar 19, 2009 | Sears Craftsman LiftMaster Chamberlain...

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