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

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Liftmaster Opener The safety sensors have been changed. Everytime I hit the button, it blink exactly 10 times then shuts. The last time it opened, it slamed hard and blinked. Since then, it has remained in the up poition. I the opener dead, or is it fixable? Tony

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  • Anonymous Jan 08, 2009

    Door will not open or close. Light blinks 10 times

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Are eyes aligned and led on for each eye. where is trolley. wedged in up position. take out safety bolt and see if it will run. need more info to help more like model,age,etc

Posted on Jan 15, 2009

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1 Answer

Overhead light will not come on when door is opened


Press and hold the Lock button until the light blinks (about 10 seconds). A single blink indicates that the timer is reset to 1 1/2 minutes. Repeat the procedure and the light will blink twice, resetting the time to 2 1/2 minutes. Repeat again for a 3 1/2 minute interval, etc. up to a maximum of four blinks and 4 1/2 minutes.

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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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Have a Craftsman 1/2hp garage door opener (HBW0777 year 1994). It won't close and goes back while blinking 8 or 9 times. Transmitting sensor (red light) is blinking 3 times (even i hold the two sensor...


Anytime the main light flashes 10 times and the door reverses to the open position it is a door sensor problem. If the transmitting sensor light is blinking it is bad.

Nov 20, 2010 | Sears Craftsman LiftMaster Chamberlain...

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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...

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Hi, My 10 years old plus Craftsmen garage door opener will open OK from any of the buttons, but will only go all the way down when I press and hold the wired button by the door. If I hit the button by the...


If the main light flashes 10 times when the door reverses it is a door sensor problem. Make sure the small light on each sensor is not flickering ever so slightly. Tweak them a bit.

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For 1/2 HP belt drive opener: With the belt off, the motor sprocket only turns 1/8 - 1/4 turn each time the door opener button is pressed. Although nothing is obstructing the door or the sensors, the...


If the main light blinks 10 times when you try to close the door it is a door sensor problem. Make sure the small light on each sensor is lit and not blinking. Tweak them a bit if necessary.

Oct 13, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

The light stays on for a long time although it shuts off (a lot more that 4.5 minutes). Can this be adjusted to be shortened? Where and how on the unit?


If you have one of the newer models the duration can be changed by holding in the lock button until the light blinks (about 10 seconds.) A single blink indicates that the timer is reset to 1½ minutes. Repeat the procedure and the light will blink twice, resetting the timer to 2½ minutes. Repeat again for a 3½ minute interval, etc. up to a maximum of four blinks and 4½ minutes.

If your opener has the motion sensor feature and a person enters the garage and walks in front of the door control the light will come on for 5 minutes and then shut off.

Sep 28, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage Door Opener Malfunction


START BY DOWNLOADING THE INSTRUCTION MANUAL FROM CHAMBERLAIN.COM (FREE PDF FILE) IT WILL WALK YOU THROUGH THE COMPLETE DIAGNOSTICS - HOW TO RELEASE THE BLOCKED TROLLEY - SAFETY EYE ISSUES ETC.

Aug 26, 2009 | Liftmaster, Chamberlain, Sears Door...

1 Answer

Garage door won't shut, light blinks 10 times.


If the light blinks 10 times it is a sensor problem. Nothing else will cause this. Tweak the sensor a bit and check it out.

Jun 28, 2009 | Sears Craftsman LiftMaster Chamberlain...

3 Answers

Craftsman Garage Opener Clicks only and LED blinking 5 times


first off, hitting extra button on remote would not do anything. Is door up or down/ where is trolley that attaches to chain, by door or motor. Is is jamned against a bolt. Try a paper clip and jump from white to read terminal. Does it work. Does light bulb blink 10 times. I ignore the diagnostic lights and go by symptons. Give more info.

Dec 29, 2008 | Sears Craftsman LiftMaster Chamberlain...

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