Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC

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Dip switch panel location on Liftmaster 1040-6

I don't have the manual to my Liftmaster Model #1040-6. I cannot locate the dip switch panel on it to change the remote codes. Help appreciated!

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There should be a round green button one the back of the unit. Press and release that button and ten press your remote button. That should program your remote.

Posted on Jan 29, 2012

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YOU CAN GO TO LIFTMASTER.COM TO DOWNLOAD THE MANUAL

Posted on Oct 04, 2010

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1 Answer

Liftmaster Garage Door Opener won't clear codes


This was a first generation learn button model. Antiquated by current technology standards. It was a two channel system. One channel for a dip switch remote, the second for a 66LM key pad. No way to erase the programming, however, by programming in a dip switch remote (61LM with the dip switches set to new positions, and a 66lm set to a new entry code) will purge the two channels of their previous memory, now set to the the new settings.

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You don't need codes. I'm not sure what you are trying to do but to program the opener for a remote you need to hold the button down on the remote while you press and immediately release the smart/learn button. The smart/learn button is on the rear of the motor unit near where all those white wires go.

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I have an older Craftsman GDO setup. 2-3 button remotes,a manual hardwired push button operator and my wifes' car has been successfully liked to operate the opener as well. Up untill just a couple of days...


I suggest you look for a Chamberlain dealer in the yellow pages and explain what you have. You are looking for a 'universal receiver' that will work with what you have.

Mar 27, 2010 | Sears Craftsman LiftMaster Chamberlain...

4 Answers

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Hi, The opener, remotes and keypads have a set of dip switches that you can use to change the code. You will find the switches when you open the remotes and keypad and are in the back cover ( depending on the model) of the opener itself. Make sure that the codes of all the switches are set exactly the same. If you need additional help let me know! Good Luck.

Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

Mar 29, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

How to set dip switches on remote for Chamberlain Liftmaster 1000


I would go with a chamberlain clicker on this issue. These remote are phased out and the 9 dips don't work well with them. Thanks BB

Mar 26, 2009 | Sears Craftsman LiftMaster Chamberlain...

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MATHCH WITH THE CODE ON THE BACK PANEL OFTHE OPENER AND THEY SHOULD WORK

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1 Answer

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open the remote there are dip switches in side and also the same looking dip switches are in the door opener check to see if they match

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1 Answer

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Its very possible for someone esle to have your code I would say try two things. The first thing is too check your wall button wire shake it is a little make sure there are not cuts or staples in the wire its self cause it to short out and run. Then change your codes is pretty easy on the back of the opener unit its self there are the dip switchs you will most likly need a step stool. Just move 2 or so of the dip switchs and then move the same ones on your remote. On your remote the dip switchs should be undernether the batter cover

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