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I have Liftmaster remote 373LM. I want to know how to clear all codes from it so I can re-program it to my door. I am changing the garage door "button" order.

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Posted on Jan 02, 2017

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SOURCE: Liftmaster Garage Door Opener Problems...

The problem lies in the RPM sensor, most likely due to the interrupter cup assembly. The interrupter cup assembly is the black cap that runs through the RPM sensor. You may have forgotten to re-attach this piece or it is probably moving too far out when the garage sets in motion. To fix this, remove the cup assembly, unscrew the two screws on the top metal piece with a 1/8 allen wrench, push the metal piece as far in as possible and put the screws back on. This will give more room for the cup assembly to spin and be read by the RPM sensor. Hope this helps!

Posted on Jul 10, 2008

  • 2 Answers

SOURCE: Chamberlain Liftmaster Professional 1/2 HP

Okay...upon further inspection, my left spring has broken in two. Going to call around for some quotes to replace the spring. Thanks for the suggestions.

Posted on Jul 25, 2008

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SOURCE: clearing codes on liftmaster garage door opener with yellow learn button

you seem to be doing right thing, hold learn button for 10 seconds, this should clear out all coded items; keypads, remotes.

Posted on Jan 15, 2009

  • 1 Answer

SOURCE: i have a pmx300IC genie

palm treo 700w off no open

Posted on Jan 19, 2009

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SOURCE: Liftmaster wireless keypad closes but won't open the door

If you are sure the battery is good you have a bad keypad. The signal strength is so weak it will not penetrate the door.

Posted on Aug 25, 2009

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1 Answer

Our remote will not open or close the garage door. Thebattery has been changed. Does it need to be re-programmed? the other remote works and programmed car remote both work fine . the model number is...


Yes, you need to press and hold the purple learn button on the back of your garage door opener and hit the button you want to program in order to reset the remote control.

In case of a problem or clarification or my solution was insufficient, don't hesitate to post me a reply.

If you are satisfied, rate my solution with the "thumbs" or (even better) add a testimonial.

Jun 11, 2011 | liftmaster 373lm Liftmaster Craftsman...

1 Answer

My wife and I have the same type remote. Hers works well and mine has for the past six months decided to work when it wants, no matter how many times or however long you hold the button down it fails to...


1. Change the battery in your remote 2. Are you using you remote in the same way as your wifes, ie on the cars sun visor, try putting both remotes in the same location and activate the garage door with both remotes several times if yours fails your remote has an intermittent fault.

Dec 28, 2010 | liftmaster 373lm Liftmaster Craftsman...

1 Answer

I have a Liftmaster garage remote keypad that I would like to change the code to. I don't know what model it is, but one code opens one side, and another codes opens the 2nd side


The easiest way to reset the code is to clear the opener memory and reprogram all remotes and keypads. First press and hold the learn button on the back of the motor for 10 sec. Do the same on the other motor. Now you are ready to program. First press and release learn button and then press and hold the remote button that you want to program. The lightbulb on the motor will flash once. For the keypad, press and release learn button. Then press 4 digit code and then press and hold enter until lightbulb flashes one time on motor. Repeat this process for each remote and keypad.

Oct 15, 2009 | liftmaster Chamberlain Garage Door Opener...

1 Answer

My Liftmaster 373LM remote and wireless 377LM Keypad not working


You should have a small wire hanging down from the back of the opener. This is the remote control antenna wire. Strip off about and inch splice a wire to it. The connections is just twisting the wires together. Run the extended wire up to the ceiling and down the wall where the door is located. Most of the time in the top corners where the weather stripping is, there is a small gap. Slip the wire through the gap so the wire extends outside of the door. The key to this is getting the wire outside. 99% of the time this extension of the antenna will be enough to conquer interference issues. You are correct that you are running on 315mhz and the military will not affect it. Let me know if it helps

Sep 29, 2009 | liftmaster Chamberlain Garage Door Opener...

1 Answer

My liftmaster 373lm door is not open any more n i have no access to the garage! i have the remote but i can c the lights flashes for seconds n then nothing happened. i have my car remote connected already...


It sounds like your vacation lock is on. This should not be engaged if you have to other way in. You will have to find another way in. You can unwire the wall station and put up a door bell type button so this won't happen again. At door dealerships you can get an emergency keyed release too that allows you to pull the red release cord with a key from the outside, 50 bucks or so. Thanks BB

Aug 22, 2009 | liftmaster Chamberlain Garage Door Opener...

1 Answer

Need to change my remote code after divorce


Follow this link for the manual and look on page for programming.
http://www.google.com/search?hl=en&client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&hs=oMg&q=liftmaster+garage+door+openers+manual&btnG=Search

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

1 Answer

Clearing codes on liftmaster garage door opener with yellow learn button


you seem to be doing right thing, hold learn button for 10 seconds, this should clear out all coded items; keypads, remotes.

Oct 21, 2008 | Sears Craftsman LiftMaster Chamberlain...

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