Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC

1 Answer

Battery replacement on outside key pad opener

How do you replace the battery in the outside key pad opener

Posted by on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 143 Answers

Ufbfj rjv uu vere ggh

Posted on Sep 03, 2010

  • robert blanchette
    robert blanchette Sep 03, 2010

    There under the number pad is a little door and depending on the model number you will have to take a little screw out and slide it down or insert under it a little screw driver and pop off the cover and replace the battery. You should not have to reprogram this device after. Thanks BB



1 Suggested Answer

  • 2 Answers

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

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

My garage door opener does not work when using the keypad just outside my garage to open/close my garage door. I checked & changed batteries. Car remotes work fine. Are buttons getting worn out?

You may want to try re-linking it to the opener (this worked on mine).
If that doesn't work it could be the button are worn out or it could be something like the transmitter is faulty.
If it won't re-link with new batteries, i would just replace it.

Mar 26, 2018 | Building Materials

1 Answer

The remote does not work on the outside of the garage. The batteries have been replaced, and I did reprogram the remotes. What's next?

My key pad outside I had to program by punching in my code and pushing in a button on the overhead unit and holding it till the light flashes two or three times.It took two of us because I am not fast on my feet to get up there.

Jan 12, 2016 | Craftsman Garage Door Opener 1/2 HP Belt...

1 Answer

I have a Sears Chamberlain garage door opener pad outside my garage. The 9V battery died and I have replaced the battery. How do I reprogram the pad?

You shouldn't need to reprogram the pad; it functions as before simply sending a signal to the opener that has the programing saved in it.

May 06, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have a new crastman garage door opener. Both clickers work inside the garage but outside the garage when the door is closed you have to click it like ten times for it to finally open. The wireless key...

Have you tried adjusting the antenna position? If you can't find a good position for the antenna, you may want to extend it and bring it close to or outside the garage door opening.

Mar 06, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

The garage key pad has stopped working

The most common problem for your situation is that the battery in your wallmounted key pad needs to be replaced. unscrew the little screw on the face of the device, remove the battery and replace it with one just like it. Radio shack usually has these batteries

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

1 Answer

The key pad on the outside of not responding when put in code

If you have replaced the battery and everything else is working then the keypad has most likely quit. Replace it with one of the same model.

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

1 Answer

Outside garage door key pad will not function in very cold weathe

Yes, that is an issue.  My suggestion is to replace the outside keyless with a wired keyless (Domino GD-1).  This will get your batteries inside so they can stay warm.

Dec 30, 2008 | Sears Craftsman LiftMaster Chamberlain...

3 Answers

Changing PIN on Key Pad

can you please provide the exact model number of your Security device...


Jul 16, 2008 | Sears Craftsman LiftMaster Chamberlain...

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

Related Topics:

201 people viewed this question

Ask a Question

Usually answered in minutes!

Top liftmaster Electrical Supplies Experts


Level 3 Expert

4354 Answers

Gil Shultz

Level 3 Expert

3382 Answers

ray gallant

Level 3 Expert

52518 Answers

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

Answer questions

Manuals & User Guides