Liftmaster 829LM Garage Door Monitor

Written by Nick McGregor. Posted in Garage Door Openers & Accessories in Plano, TX, Garage Door Openers in Plano, TX


What does the 829LM do?

The 829LM Garage Door Monitor is a very handle tool to have in your house. This device was designed to indicate the status of your garage door from inside your house. It can be programmed with up to four garage door openers! This device is compatible with MyQ technology garage door openers only.  You can put it anywhere in your house and you are able to open and shut your garage door as well as know if it is opening.

How does the device work?

To set-up this device all you need to do is connect the adapter to the garage door monitor and a standard 110 Vac outlet. Then you need to program it, you do this by pressing and releasing the learn button on the back of the garage door monitor. You have 60 seconds to press and release the learn button on the garage door opener. There will be 2 short beeps will confirm the garage door monitor has been successfully programmed. Note that the program additional garage door openers, repeat the steps above on each individual garage door opener, the garage door monitor can be programmed with up to 4 garage door openers! If you are wanting to erase the memory, all you have to do is press and hold the learn button on the garage door monitor for at least 6 seconds. There will be 1 short beep that you can hear at the beginning, and 1 short beep that will confirm that all codes have been erased.

What do all the lights mean?

It might be kind of confusing with all the lights that the garage door monitor has, so here is what they all mean:

  1. Red light blinking and green light off- at least one garage door is open
  2. Red light off and green light solid- all doors are closed
  3. Red light solid and green light off- no signal has been received from a programmed garage door opener within the last 20 minutes (implies a power outage or a garage door opener malfunction)
  4. Red light solid and green light solid- the garage door monitor has been successfully programmed.
  5. Red and green LEDs blinking simultaneously- the garage door is closing after pressing the close door button
  6. Red and green LEDs blinking alternately slow- the garage door monitor is not programmed to any garage door opener
  7. Red and green LEDs blinking alternately fast- the garage door monitor is a programming mode
  8. Both red and green LEDs are off- there is no power to the garage door monitor.

You can look in the user’s manual for any further assistant with the lights as well as what all the beeps mean.

Where can you pick it up?

We can these Liftmaster 829LM garage door monitors in stock at our showroom located in Plano. You can come pick one up for only $45 dollars plus tax. Also why you are there you can ask about our MyQ technology that your garage door opener is compatible of having as well!


By Nick McGregor, General Manager of Plano Overhead Garage Door

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plano door logo Plano Overhead Garage Door
1100 N. Central Expy Suite #A
Plano, Texas 75074

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  • September 23, 2016:

    "We've used Plano Overhead many times since the late 1990's and have been pleased every time!"

    -Sally R.    Plano, TX
  • September 7, 1987:

    "Prompt, courteous, and took care of the job in a very professional manner.  The enthusiasm to do the job right was refreshing to say the least."

    -Jared F.    Richardson, TX
  • January 2, 2017:

    "The customer service of this company is great.  They go the extra mile to make things right.  Use this company.  They fix your problems correctly and have quick service too."

    -Richard S.    Dallas, TX
  • March 14, 1995:

    "Plano Overhead quickly diagnosed my problem, made the necessary repairs, and adjusted the door for proper operation.  All I can say is, again, thanks for the excellent service and very professional service personnel.  The cost was very reasonable as well!"

    -Lynn P.   McKinney, TX
  • December 4, 2006:

    "Great service! I couldn't be happier!  I'm just amazed that in today's hurry up, make a quick dollar and get out world, this kind of expert service and friendly attitude still exists.  I don't mind paying for this kind of service and attitude.  I'll never call anyone other than Plano Overhead!"

    -Steve S.   Wylie, TX
  • January 27, 2017:

    "My garage door spring broke this morning.  I had used Plano Overhead before and was really impressed with their customer service and the professionalism of their technicians.  They stand behind their work and their products.  I have always recommended them to people I know and will continue to do so!"

    -Mark Z.   Allen, TX
  • January 14, 2004:

    "Thank you for your timely and professional service and your reasonable prices!"

    -Emmett W.   Garland, TX
  • December 6, 1993:

    "As a small business owner myself, I would like to commend your company for taking the extra step many business fail to take these days. Please feel free to add me to your list of references."

    Johnathan T.    Plano, TX
  • March 12, 2011:

    "Great service, great price, great company."

    -Chris H.    Plano, TX
  • August 13, 2006:

    "I cannot believe I got a Thank You Note from you guys!  Your promptness, courtesy, sympathy, and efficiency all made my situation a little easier."

    Richard W.   Murphy, TX
  • June 27, 2013:

    "The entire process was fantastic.  I walked into their showroom, and a representative was more than ready to help!"

    -Tony B.    Plano, TX
  • February 23, 2017:

    "Technician arrived on time on very short notice.  He worked efficiently and completed work in about one hour.  He even took time to answer questions and go over the work!"

    -Viadhe T.    Carrolton, TX
  • May 7, 2014:

    "Everyone from the technicians to the receptionists are always so pleasant to deal with.  You will not be disappointed with this company!"

    -Betsy Y.    Allen, TX
  • May 30, 2015:

    "Service was great, very professional and helpful!"

    -Steve J.    Frisco, TX
  • August 8, 1997:

    "I appreciate the fast service.  It's great to find a company I can rely on.  I'll recommend you every chance I get!"

    Stephany R.   Richardson, TX
  • January 5, 2012:

    "It is great to find a local company that you can depend upon.  I will definitely recommend your company to others who may have problems with their garage door."

    -Christina L.     Allen, TX
  • October 31, 2014:

    "About as good an experience as you can get, the installer was professional about his business, showed up on time, and completed the job in the time estimated."

    -Mark M.     Frisco, TX
  • August 19, 2014:

    "Plano Overhead Garage Door runs their business the way consumers wish all businesses were run.  They are simply a premier service provider."

    -Arlene M.    Plano, TX
  • January 6, 2017:

    "Scheduling was very responsive both via email and over the phone.  They were very professional and timely during the install, and even programmed my vehicles to the garage door opener before leaving.  I will continue to hire Plano Overhead Door in result of my experience today and will highly recommend them to my neighbors!"

    -Jon M.    Plano, TX
  • June 17, 2014:

    "Punctual, knowledgeable, and fast."

    -Dawn H.    Richardson, TX
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