Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC

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My garage door will not close unless...

My Liftmaster garage door opener will not close unless I am holding down the hard-wired button, remote control button or key pad button. If I release the button, it immediately goes back up, however, once it is closed all the way it will remain closed. The lights in the front of the motor flashes and clicks three times when I push the button to close the door as usual; and it do not close. When I'm holding down the button to close the door it goes down slowly. I need your help! Thanks!

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Check your down limit switch and even your up one too almost sounds like one is stuck one way or the other.

Posted on Jun 19, 2009

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Door does not open or close when using the remote. It closes only when pressing the hard wired square white touch pad. Behind the opaque white touch pad, one can see a flashing/blinking green light.


Using a step stool, reach up and remove the covers (the white covers pop off). The instructions will be labeled on the back plate for setting your remote control's security code Make sure the remote has a battery installed and is compatible with your garage door opener. Or go to the LiftMaster web site and down load its operators manual.
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Jul 27, 2011 | liftmaster Garage Door 1/2 Hp

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Garage door won't close unless I hold down the wall button until it is fully closed. Checked the L.E.D light at motor and it flashes 2 times in about 8 seconds. Sensor with amber light is on, other does...



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.

Oct 09, 2010 | liftmaster Chamberlain Garage Door Opener...

1 Answer

Have sears garage door opener it lifts allright but cant close unless you hold the wired pad. works ok up with the remote just jumps a little when you push down button will not close with remote.


Check your door sensors and make sure they are pointed at one another. Each of them has a small light that should be lit when they are properly aligned. Tweak them if necessary. If you can't get both lights to come on then one of the sensors has quit working.

Jan 22, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My wired key pad in the garage opens and closes the door but the buttom keeps blinking fast. My two car remotes stopped working. My remote key pad on the house works. Whats with the fast blinking and...


Press and hold for 3 seconds the button on the wall control that has an icon of a lock. The light should quit blinking and your remotes will once again work. Holding that button for 3 seconds toggles your openers vacation mode.

Nov 23, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Remote control for garage door suddenly stopped working.


Press and hold for 3 seconds the button on the wall control with the lock icon. There you go.

Nov 21, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Wall mount button LED is flashing, remotes won't work, door won't close unless the wall mount button is held down until the door is fully closed


Sounds like you have a couple problems. First of all press and hold the button on the wall control that has a lock icon for 3 seconds and release. This should take care of the flashing LED and the remotes will now work. Having to hold the button on the wall control until the door is closed is usually a problem with the door sensors. Make sure they are pointed at one another and the small light on each is lit and not flickering.

Nov 16, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My garage door won't close unless I hold the main button down in the garage. As soon as it closes it opens up again unless I press the button quickly. I can open it up using the remote, but cannot close it...


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

Oct 27, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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

Oct 07, 2009 | liftmaster Chamberlain Garage Door Opener...

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