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

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Garage door my sensors one glows yellow the other is green is this right?door opens fine at times but mostly goes up 5 inches then stops.other times opens all the way but reverses on down travel getting totally frustrated any help

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Sensor got bumped, realign till both lights show green

Posted on Mar 30, 2008

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swolfinor
  • 504 Answers

SOURCE: sears garage door opener senors

CHECK YOUR SPRING - IF IT HAS A GAP YOU NEED TO REPLACE IT.

I DO NOT RECOMEND THIS AS A DIY PROJECT - IF YOUR SPRING IS BROKEN CALL IN A PRO

HOPE THIS HELPS

Posted on May 27, 2010

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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Chamberlain troubleshooting


Check to see if sensors (eye) on sides of door are lined up, they need to be looking directly at each other. If that doesn't work change sensors, simple, install, hook up 2 wires per sensor, wire with line to same wire, blank wire to same blank wire and align so sensors see each other.

Jul 29, 2014 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My Craftsman garage door will not close, only a few inches at a time


have a problem which returns every year when outdoor temperatures drop close to freezing. garage door will open only a few inches, then stops. I can close it and try opening it again... same result. After five or six such attempts it typically will open. Interestingly, when I push the switch button mounted on the interior wall of my garage and keep it pushed, the door will open, until I release the button at which point it stops opening.

Dec 19, 2013 | Building Materials

1 Answer

LiftMaster Pro 1/2 hp 41AS050-1 won't shut. when


Check the resistance down button (There is one for down and another one for up). You may need to adjust the sensitivity. That way even if for some reason the have hard time coming down, less sensitivity may solve that issue.

Oct 22, 2013 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have an access master door opener..it goes up about 6 inches and stops, hit switch again, goes down, hit switch again goes up about two feet, hit switch again goes down, third time switch nothing until...


Door sensors have nothing to do with door opening. Only closing. It sounds like you have a bad gear in the motor unit. Remove the cover and it will be obvious if the gear is bad.

Feb 15, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

We have a 1/2 hp garage door opener and it is blinking 4 times. it will shut with continuous pressure on the button but not with a single press. the sensors are different, one has a continuous yellow light...


The most common reason for the green sensor to flash is because they are not pointed directly at one another.

  1. Check each sensor for a steady glowing indicator light. If both indicator lights are on, or if one indicator light is flickering, the sensors may be slightly misaligned. To check for misalignment; obstruct the beam of the sensors so that they cannot see each other. When the beam is blocked, the indicator light on one of the two sensors will temporarily go out. This is the receiving sensor. Remove the obstruction and loosen the wing nut on the back of the receiving sensor. Adjust the receiving sensor until the green indicator light goes out, if not already out, then realign until the green light is bright and steady, then retighten the wing nut. This usually takes a couple of attempts before it is back in alignment.

Jan 01, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door won't close, blinks 10 times, sensor light yellow


Anytime the main light flashes 10 times and the door reverses to the open position it is a door sensor problem or the wiring to them. Nothing else causes this symptom.

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

1 Answer

Garage opener not responding with remotes, keyless pad, or wall console. Can hear it click but nothing happens. Green light in opener blinks 5 times. When i reset the green light stays on until i try to...


UNPLUG UNIT TO RESET.

IF IT STILL FLASHES 5 TIMES AND MOVES 6-8 INCHES REPLACE RPM SENSOR.

IF IT STILL FLASHES 5 TIMES AND DOESN'T MOVE REPLACE LOGIC BOARD.

Apr 17, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door opener moves foward about 10 inches then returns


UNPLUG THE UNIT FOR ABOUT 5 MIN. TO RESET TRY TO OPERATE IF IT STILL MOVES 6-8 INCHES AND FLASHES 5 TIMES THE RPM SENSOR IS YOUR PROBLEM - COULD JUST BE THE CUP HAS MOVED ON THE SHAFT. IF IT IS IN PLACE AND STILL NOT WORKING REPLACE THE PICKUP.

Dec 11, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Sears garage door opener senors


CHECK YOUR SPRING - IF IT HAS A GAP YOU NEED TO REPLACE IT.

I DO NOT RECOMEND THIS AS A DIY PROJECT - IF YOUR SPRING IS BROKEN CALL IN A PRO

HOPE THIS HELPS

Mar 21, 2008 | Sears Craftsman LiftMaster Chamberlain...

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