Replace the logic board for garage opener

Replace the Logic Board of CHAMBERLAIN LIFTMASTER Garage Opener

The garage door is opened by itself without any triggering of remote or wired button. And removing battery of remotes and disconected the wire from opener switch didn’t help at all. It seems like opener logic board got damaged by power surge one day.

And the manufactured company was asking me to replace the logic board that will cost me about $80 that includes shipping. Do you have any different idea? Well $80 is too expensive  and I am not sure that will fix the issue initially. And I have put temporally remedy spending $20 from homedepot  that remote power switch.

So, before running the garage opener remote, I have to connect the power on opener by turning on  remote switch of power connector. Ha. it is bit complicated but it was working fine but not for whole family anyway.

Since it is secured by turning off the power  I can stay for a while. However, my wife start complaining to have new opener to use opener remote directly rather than manual way of remote two times. So, I could find out cheaper one from, since I am a prime member the shipping was free.

Then, I replaced a logic board right away. Wow, it worked out perfectly and now we are not using power switch remote anymore. 🙂
The below is the email chain to get a support from Chamberlain.

Why is the opener activating by itself?

Dear XXX,

Thank you for contacting Chamberlain Technical Support. Below is a response to the inquiry you recently submitted on our website.

There are a few different reasons why the opener may be activating by itself. Here are the reasons and how to troubleshoot them:

Answer Title: Why does my garage door opener activate on its own?
Answer Link:

If you have done any programming of a device to your opener just before you noticed the “Phantom operation” this is the only way a neighbor’s remote may have been programmed in. When you press the programming or “learn” button, you are leaving your programming channel open for up to 30 seconds. Anyone pressing a remote control within range of your opener could program into your opener during this time.

If you have further questions or If you would prefer to troubleshoot with me over the phone, provide me with the best phone number and time to contact you.
Chamberlain Product Support


I have followed your instruction to fix the issue.
But all of steps were failed except replacing the receiver logic board.
The opener is still operating by itself.  Sometimes, it was closing by itself too or opening half of the garage door.
I am concerning a lot on this behaviors that could lead some worst cases of my garage door and people.
Please provide me detail instruction to replace the logic board and replacement of logic board.
Since this is a defect of your product, you company should fully support this as soon as possible.
Thanks in advance.

Dear XXX,

Thank you for providing the serial number for the opener. I emailed a response to you but perhaps you did not get it. Here is is again:

It appears this opener is about 4 years old. The best price I can offer you for a logic board would be $ 62.50 plus shipping ($10.70).

Parts can be ordered directly through us or through an authorized dealer. For a dealer referral please visit Lift Master’s website at .
Dealer prices may vary.

If you would like, try to find a better price from a dealer or the internet first. You will want to be sure the part number is 41AC075 or 41AC075-2A. Both of these numbers are for the same board and both are for your opener.

If you need further assistance or would like me to place an order for you, please reply to this email and provide a good time to call.
Chamberlain Product Support

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