Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC

1 Answer

My lift-master garage opener works just fine from wall button, but will only open but not close from any remotes (from car or original remotes) If I open it with remote and immediately close with wall button it won't even open again using remotes for some time. I have re-programmed all remotes and replaced batteries, but this only helped for a few minutes. It is a model 1245R, 1/3 HP, 75 Watt Max, P/N 41A5021-1C, 06/98. Please help. Thanks

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

We have the same model and similar difficulties. We were told it's a bad antena. Not sure if there is anything we can do about this. Sometimes it works with the remotes, sometimes not. Always works with the wall switch, because that's wired.

Posted on Mar 09, 2011

  • Anonymous Oct 04, 2013

    My old garage door opener used to cause me so many problems but I switched to the liftmaster in Calgary and I haven't had one problem with it.

×

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

Lift master formula I will not close, only goes half way down, but fully opens. Worked fine until my wife closed the door on the car, after that it would fully close


I had this problem as well with the door opening just fine but was not closing when using the remotes or when breifly pressing the wall mounted control. The door would close only when using the wired wall mount control. I have experienced this problem with other garage door openers I've had in my previous homes and it was always caused by sensors at the bottom of the door tracks being either misaligned or the lenses were dirty. In this case, and it was just a moment ago today, I simply cleaned the sensor lenses and then the door began to function properly. Give it a try.

Jan 28, 2013 | liftmaster Chamberlain Garage Door Opener...

1 Answer

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 lift Master door and the remotes work fine but the door will not open or close using the wall button or the keypad.


Are you sure you aren't stating the facts just the opposite of what they are? That would be a fairly common complaint.

Aug 20, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Master lift remotes suddenly won't work. Wired panel button works opening and closing door.


Make sure the light in the wall control is not blinking. If it is press and hold the lock button on the wall control for 3 seconds.

Feb 11, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have a Lift-Master Security remote garage door opener. It has a new battery. Can it be reprogrammed or do I have to replace the remote?\r\nThank you for your assistance. Model number971LM. It will...


ANY TIME YOU CHANGE THE BATTERY IN A REMOTE IT NEEDS TO BE REPROGRAMED.

ON THE CIRCUIT BOARD YOU WILL FINS A SQUARE BUTTON.
PRESS AND RELEASE NOW HOLD DOWN THE BUTTON ON THE REMOTE FOR ABOUT 20 SECONDS. WHEN YOU PRESS THE REMOTE THE NEXT TIME THE DOOR SHOULD OPEN.

Oct 21, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Lift master 1021499A do not have the remote and do not know the code Please help, what type of remote do I need and how to program it The garage door works (open/close) with wall mounted button


You need to get the correct model number which you should be able to find on the end closest to the door. Any door opener service company will be able to help you.

Aug 17, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My access Master 350 will not open or close when using remotes


If the light in the wall control is flashing your opener is in the lock/vacation mode. Press and hold the button with the lock icon for 3 seconds. If this is not the case your logic board is bad.

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

2 Answers

Lift-master 2000SDR remotes will open but not close garage door. Same problem with all clickers and even those programmed into the cars. What could this be and better yet, how do I fix it?


Lift-Master 2000SDR opener. Opener generally works fine from the remotes. However, first time in the morning in cooler weather, it will start to close and the reverse and the lights blink. I have checked the senors - appear to be aligned properly. I have lubed the gear and used garage door spray on the rollers and hinges at the proper places. To close the door when this happens, I have to hold the wall button.

Nov 25, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage Door won't close


It sounds like the door sensors have been bumped or somehow gotten misaligned. Tweak them until the light on each one is lit and not blinking. They must be pointed at one another.

May 30, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage Master 1/3 HP 1997 Door Working, not responding to Remote


I have the exact same situation, except my model (139.53607) is older than yours and does not even have an LED. Remotes only works after after shop light goes off (5 minutes or so), but wall button works fine. Did call Sears Service and the tech told me the logic board is probably shot. Don't want to waste money on service call so I'll probably have to buy a completely new unit in the Spring and go through the winter without the use of a remote.

Jan 24, 2009 | Sears Craftsman LiftMaster Chamberlain...

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

618 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...