Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC

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Lynx garage door light flashes door won t open

Light flashes 3 times door won t open or close

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 118 Answers

SOURCE: My Liftmaster garage door opener will not close

You have a problem with the safety eyes. Make sure both eyes have a lit Led light, if not realign sensors

Posted on May 15, 2009

  • 25 Answers

SOURCE: Liftmaster Remote garage door openers work intermittently.

check to see if your ant. is up inside of the cover it's a little black wire that hangs outside of the operator shiould be about 6 inch.

Posted on Jun 07, 2009

  • 25 Answers

SOURCE: Garage door will not close from remote or car.

wI have never heard of this problem. you have to hold the button on your wall in to close the door. no way this is not right something wrong with your board insid the opener. get help from a pro. I would love to see this been doing this for 20 years never heard of this.

Posted on Jun 20, 2009

  • 34 Answers

SOURCE: Door won't close unless I hold the button all the way down.

make sure the eyes are clean and aligned if the opener thinks something is obstructing its path it will not close

Posted on Oct 10, 2009

swolfinor
  • 504 Answers

SOURCE: Garage door won't close unless


WHEN HOLDING IT DOWN MAKES THE DOOR CLOSE PROPERLY THE PROBLEM IS IN THE SAFETY EYES.


CHECK FOR A LOOSE OR BROKEN WIRE.

ARE THE EYES WIRED CORRECTLY?

ARE THEY AIMED AT EACH HOLDING DOWN THE WALL BUTTON OVERRIDES THE SAFETY EYES.

Posted on Oct 22, 2010

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1 Answer

How & where would I get parts to repair my Lynx 455 garage door opener, installed in 1989 ?


Wow - lots of hits. Google: Lynx 455 garage door opener parts

This will start with service vendors who have parts and are close to you. After that, you will see the manufacturer pages.

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Push buttons on remotes won't raise/close lift master mod 81lm


Check to see if the light in the wall control is flashing. If it is press and hold the lock button for 3 seconds.

Jun 13, 2012 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have a 3/4 horsepower liftmaster garage door opener, both the remote and the wall button won't close the garage door but both will open the garage door. however, the garage door will close if I hold...


If when closing the door it reverses to the open position and the main light flashes 10 times it is a door sensor problem. Make sure the small light on each sensor is on and not flickering ever so slightly. (check closely) Tweak them a little even though they may seem to be okay. Check for 5vdc between terminals 2 and 3 on the rear of the motor unit. If there is no voltage or if it is greater than 6vdc the logic board is bad.

Sep 26, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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...

1 Answer

Craftsman 53918 - 3/4 hp, belt drive garage door opener. Wall unit says safety sensors misaligned. Replaced them as suggested by manual, no fix. Does not appear to be any power from where you plug...


The main light flashing 10 times is the sign of a door sensor problem. Check to see if the small light on each sensors is lit and not flickering. If you cannot get both lights to come on your sensors or the wiring to them is bad.

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

1 Answer

HAVE A 1/3 HP CRAFTSMEN OPENER THAT WILL OPEN WITH THE REMOTE BUT NOT CLOSE MUST HOLD THE HARD WIRE BUTTON TO CLOSE. GREEN LIGHT IS FLASHING.


If the main light flashes 10 times and the door reverses to the open position you have a door sensor problem. Make sure they are pointed at one another and the small lights on each one is lit and not flickering. Tweak them to see if you can get the lights on. If not you have a sensor that has failed.

Mar 19, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Hello does my lynx 455 plus sensors have lights


Not familiar with lynx but every sensor I have seen or heard of has a light. It is the only way to tell when they are pointed correctly at one another.

Jan 08, 2010 | Sears Craftsman LiftMaster Chamberlain...

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