Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC

1 Answer

Remote suddenly stopped lifting garage door. Still able to open door from button in the wall of the garage. Figured it was a battery problem. Installed new battery (3 volt duracell)--negative side down. Still not working.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Master:

    An expert who has achieved Level 3.

  • Master
  • 473 Answers

Check Battery .... Possibility Corosion inside the unit Chek if you cant open the unit then check for anormal mosture or water inside the unit

Posted on Sep 30, 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

Garage Door Remote


Did you happen to put a new light bulb in it? I put an LED bulb in mine and the interference caused the remotes to stop working. I had a bear figuring it out, because it seemed to be totally random. Sometimes they would work and sometimes they wouldn't. Once I switched back to an incandescent, it worked fine.

Jan 17, 2014 | Genie Wayne Dalton 36560U 1/2 Hp Dc Belt...

1 Answer

Garage door works with the remote, but not the door closer in the garage


Replace button on wall. Check wiring between button and opener.
Look at product manual and see if manual has troubleshoot section.
If there is no wire between wall button and opener, the remote may be one of those 'self learning' unit and may have to be reprogrammed. And -or battery replaced.
Otherwise the wall button connects directly to circuit board on opener, and cannot be repaired without ... parts, schematic, electronic knowledge.
Replace garage door opener.
http://waterheatertimer.org/pdf/Liftmaster-garage-door-manual.pdf
Add a comment and say what you find.

Jun 11, 2013 | RTO Automatic Garage Door Closer

1 Answer

I have a liftmaster formula 1 1280R opener that works fine from the wall mount but all of a sudden both remotes and the built-in remote in my car stopped working. It is not the batteries in the remotes. ...


The motor/control unit may have gotten reset. It needs to relearn the codes transmitted by the remotes.

MIne has a "learn" button on the control unit. Press and hold, then press the button on the remote. Lights will flash indicating it has received and stored the code. Release button.

Check to see if the remote works now. If so, all three should be working. If not, dig up your manuals.

Feb 28, 2013 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

R garage door opener model 139.53640srt -remote car openers wont work suddenly. have to open using the house opener, whose light is blinking


Press and hold for 3 seconds the lock button on the wall control. The light should stop blinking and your remotes should now work.

Nov 07, 2010 | 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

Garage door opener remte built in in my van suddenly stopped


TRY DISCONNECTING THE WIRE TO THE WALL BUTTON. IF THE VISOR REMOTE NOW WORKS YOU HAVE A BAD BUTTON.

HOPE THIS HELPS

Jul 30, 2009 | liftmaster Chamberlain Garage Door Opener...

1 Answer

Garage Door Remote Openers Stopped Working Suddenly


Check the wall control. If the small green light is blinking press and hold the button with the lock icon for 3 seconds.

Jun 01, 2009 | Sears Craftsman LiftMaster Chamberlain...

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

219 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

43030 Answers

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

Answer questions

Manuals & User Guides

Loading...