Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC

1 Answer

Chamberlin door will not close

Only closes when holding the button down

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Contributor
  • 504 Answers

THE PROBLEM IS IN THE SAFETY EYES
EITHER ALIGNMENT - WIRING OR A BAD EYE

HOPE THIS HELPS

Posted on May 26, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Door goes down and when it stops at botton, it turns and goes back up ??? Need adjusting ..How can I adjust???


Adjust the position of the door by using the black and purple buttons. Black moves the door UP (open) and purple moves the door DOWN (close)
Setting the up position: 1. Press and hold the black button until the LED starts flashing slowly, then release. 2. Push and hold the black button until the door reaches the desired UP (open) position 3. Push the door control or programmed remote control. This sets the Up (open) position and begins closing the door. 4. Immediately when the door begins to close press and release the black or purple button. This will stop the door Setting the Down position: 5. Push and hold the purple button until the door reaches the desired DOWN (Closed) position. 6. Once the door is closed, If there appears to be too much pressure on the door, you may toggle the door back and forth using the black and purple buttons to reach the desired closed position. 7. Push the door control or programmed remote control. This sets the Down (closed) limit and the door should open.

Aug 11, 2011 | Chamberlain 3/4-HP Whisper Drive Plus...

1 Answer

I have a chamberlin liftmaster 1/3 hp.. the chain is loose, it drags on the garage door as it goes up and down. I can only get the door to go down if I hold the button on the wall?? How do I fix this?


It sounds like a door sensor problem for one. If the main light flashes 10 times when you try to close the door the sensors are probably not pointed at one another. Tweak them a bit and check to make sure the small light on each one is lit and not flickering. If you cannot get both lights to come on you have bad sensors. The chain can be adjusted at the trolley.

Jan 12, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have 1half h\p chamberlin garage door opener


Unplug the opener and remove the bulbs. Use a small screwdriver to pull out on the center contact in the socket. Make sure you are using standard bulbs.

May 10, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have 1half h\p chamberlin garage door opener


Unplug the unit and remove the bulbs. Using a small screwdriver pull out on the center connection in the socket.

Apr 03, 2010 | Sears Craftsman LiftMaster Chamberlain...

3 Answers

Security light will not work


You must have a three function wall switch. This means in addition to a button that opens and closes the door there are two other buttons on the same wall switch. One is marked LIGHT and the other is marked LOCK.

To have your lights come on automatically when you walk into an open garage you must START with the lights ON. To turn the feature on, turn the lights on manually with the wall switch, then press and hold the LIGHT button for about 10 seconds until the motor unit light bulbs flash. Now, if the light bulbs are on, manually turn them out and then walk out through the open door. The light bulbs should come on.

To disable this feature, start with the light bulbs OFF and everything else is the same.

Aug 12, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My garage door will not close unless...


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

Jun 19, 2009 | liftmaster Chamberlain Garage Door Opener...

1 Answer

Garrage door opener ability to close the garrage door


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

ARE BOTH LEDS ON? - CHECK FOR A LOOSE OR BROKEN WIRE.
ARE THE EYES WIRED CORRECTLY?
ARE THEY AIMED AT EACH OTHER?

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

1 Answer

Need to program my chamberlain #953CB from a working gate opener


the chamberlin remote only work with a chamberlin reciever, if you have this it will be a silver box that looks like diamond plate material inside you operator, take of the front cover on this box and you will see a black button that says program push and hold this button down then push your remote button down while holding it close to the box you will see a yellow led flash and then it is set. if you only have a single button remote you will only be able to set it to one operator.

Nov 26, 2008 | Chamberlain 950CB Remote Control

Not finding what you are looking for?
liftmaster Chamberlain Garage Door Opener Transmitter 300MC Logo

265 people viewed this question

Ask a Question

Usually answered in minutes!

Top liftmaster Electrical Supplies Experts

Vince Heuser

Level 2 Expert

118 Answers

tamska1102

Level 1 Expert

28 Answers

ray gallant

Level 3 Expert

43091 Answers

Are you a liftmaster Electrical Supply Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...