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Garage door opener light flashes after door shuts

When the garage closes, the light on the box flashes continuly for about 1-2 minutes then stops. Normally when the door goes down the light stays on without flashing for two or three minutes.

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  • Contributor
  • 6 Answers

Check the electronic eyes that sense when something is in the path of the door, sometimes they can get knocked out of place, something could be blocking them, or there could be a build up of cobwebs in the opening for the electronic eye. Typically when the light flashes it is indicating that somehow the infared beam is obstructed

Posted on Feb 08, 2012

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Posted on Jan 02, 2017

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  • 3197 Answers

SOURCE: My garage door opener won't close the garage door.

Most likely your door sensors have been bumped and are not aligned properly. Make sure they are pointed at one another and the small light on each one is lit and not blinking.

Posted on Apr 30, 2009

  • 3197 Answers

SOURCE: Garage door closes then reopens (does not stay shut)

On the side of your opener you will find the down limit control. Using a small screwdriver turn this control in the opposite direction of the arrow printed on the cover. May take some tweaking to get it just right.

Posted on May 12, 2009

Mrteaze
  • 101 Answers

SOURCE: Garage Door will not stay closed.

You need to check the adjustment for the travel of the door ... All automatic closers have a built in safety mechanism that prevents children, pets and even yourself from being crushed by the door ... so if the travel is set to low the door will hit the ground too hard and safety mechanism will activate opening the door again! Look at you documentation for how to adjust this for your particular model :)

Posted on Sep 29, 2009

tlm931
  • 273 Answers

SOURCE: My garage door won't close unless I hold the main button down

your garage door has saftey sensors at the door
these are photo eyes
in the owners manuel that came with the opener
that has pictures in it which would help
the photo eyes need to be clear of debri and aimed at each other with no obstruction
there are leds on each sensor and when aimes properly they should be light if i remember correctly
if you can not get them to light then you may have to replace the sensors

Posted on Oct 27, 2009

  • 3197 Answers

SOURCE: Hi, I have a Lynx 455

Check the sensors in the doorway. Sounds like they may be misaligned. They need to be pointing at one another to work properly.

Posted on Sep 28, 2010

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Entrance light on Lift Master garage door opener won't stay on when door is opened ?


Light Feature
Activate the Light Feature
  1. Close the garage door.
  2. Start with the garage door opener lights "ON".
  3. Press and hold the light button for 10 seconds. (Upon pressing the light button, the lights will immediately turn off and come on 10 seconds later.)
Deactivate the Light Feature
  1. Close the garage door.
  2. Start with the garage door opener lights "OFF".
  3. Press and hold the light button for 10 seconds. (Upon pressing the light button, the lights will immediately turn on and go off 10 seconds later.)
Light Timer
Press the Light button to turn the opener light on or off. It will not control the opener lights when the door is in motion. If you turn it on and then activate the opener, the light will remain on for 4-1/2 minutes. Press again to turn it off sooner. The 4-1/2 minute interval can be changed to 1-1/2, 2-1/2, or 3-1/2 minutes as follows:
  1. Press and hold the Lock button until the light blinks (about 10 seconds).
  2. A single blink indicates that the timer is reset to 1-1/2 minutes.
  3. Repeat the procedure and the light will blink twice, resetting the timer to 2-1/2 minutes.
  4. Repeat again for a 3-1/2 minute interval, etc., up to a maximum of four blinks and 4-1/2 minutes.

Oct 20, 2017 | Building Materials

1 Answer

I have a Craftsman Keyless entry model 132B2386-6 with flashing lights, wont open. Already put in new battery still doesn't work


Why would my Keyless Entry close but not open the garage ...

www.shopyourway.com > Manage My Life > Questions
Mar 27, 2008 - I have a Craftsman Security+ Keyless Entry, P/N 139.53684 purchased with my ... However, the door will not open, but the keypad flashes as before. ... Check if there is a flashing green light on your wall control in the garage. ... The 2 remotegarage door openers won't open or close the garage door; but the ...

Craftsman garage door opener won't open or close, why ...

www.shopyourway.com > Manage My Life > Questions
Hi, I have a Craftsman 1/2 HP garage door with keyless entry (P/N ... When I click theremote or the wired button, the main lights come on, the motor moves ... Five flashes means that the RPM sensors has most likely stop communicating.

LiftMaster - Support - Videos ' LiftMaster

https://www.liftmaster.com/Customer-Support/Videos

Chamberlain GroupHow to program a wireless keyless entry using your garage door opener's LEARN button. How to ... Why the LED or light on the door control is blinking and my remotecontrol is not working? Why isn't ... Why won't my door fully open? How to ...

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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

The wall control unit is flashing but it will close and open the garage door, but when I press the remote from the car the light flashes twice and it will not shut the door.


You may have 2 problems here. First press and hold the lock button on the wall control for 3 seconds. This should stop that flashing and your remotes should work. If the main light is flashing when you try to close the door you need to check that your door sensors are pointed at one another and the small light on each one is lit and not flickering. Tweak them a little.

Mar 01, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+: My craftsman 1/2 hp garage dood does not close whe...


If the main light flashes 10 times when you try to close the door it is a sensor problem. Make sure they are not flickering ever so slightly and that they are not loose on their brackets. Tweak them a little bit.

May 18, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Chamberlain 1/2 HP garage opener main part 41A5389-1 will not close door. Motor stops about 1 ft into travel on screw. Nothing blocking door - can easily open and close door manually. What to do?


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.

May 11, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

6 month old 139.53985dm garage door opener shuts off going down


Unplug unit at power source and check and tighten all connections in the control box. And try this link.

http://www.garagedooropeners.us/technical_information.html

Mike

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

1 Answer

Garage door closes and then automatically opens half way


ADJUST THE DOWN LIMIT IT THINKS THERE IS AN OBSTRUCTION AND IS REVERSING LIKE IT SHOULD.

TURN THE LIMIT ABOUT 1/4 TURN AT A TIME.

HOPE THIS HELPS

Mar 15, 2009 | Sears Craftsman LiftMaster Chamberlain...

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