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Garage Door Opener Remote Control Programming Instructions for Marantec Garage Door Openers

ML-143(1,2,4)NL, ML-243(1,2,4)NL, ML-343(1)NL, ML-140(1,2,4)NL,ML-240(1,2,4)NL, ML-139(1,2,4)NL, ML-239(1,2,4)NL


A family of state-of-theart transmitters, each transmitter is custom encoded and ergonomically designed to be an integral part of your garage door opener system, with three styles to suit your personal preference.

  • Mini (1-, 2- or 4-channel)
  • Micro (1-channel), the smallest transmitter of its kind.
  • Midi (1-, 2-, or 4-channel

1.   Using the Transmitter

         To open or close garage door, press and hold the button (Mini and Midi transmitters have indicator lights that will start blinking). When garage door begins to move release button.

  • To stop the garage door during travel, press and hold button until door stops, then release button.
  • To continue the garage door travel after stopping it, press and hold the button. Once pressed, the door will travel in the opposite direction.

2. Transmitter Mounting

The transmitters can be conveniently mounted inside your car using the mounting plate, or the mounting plate and visor clip (Midi and Mini Transmitters only).

Mounting Plate:

The mounting plate enables you to mount the transmitter easily to the dashboard or other convenient area.

  • Secure the mounting plate to area of preference using hook and loop closure (not provided) or other means.
  • Snap the transmitter into the mounting plate, which will hold it firmly in place.

Visor Clip (Midi and Mini Transmitters)

The visor clip allows for easy mounting of the transmitter to a car visor.

  • Attach visor clip to mounting plate.
  • Snap transmitter into mounting plate.
  • Affix complete assembly to visor.

3. Battery Replacement

The installation of the battery for Midi and Mini is the same.

When replacing batteries follow the steps below:

  • Remove battery compartment cover (back of transmitter) by using small screwdriver.
  • Insert a 12V battery (type 23A).
  • Replace battery compartment cover.

The installation of the battery for the Micro:

When replacing batteries follow the steps below:

         Remove battery compartment cover (front of the transmitter).

         Insert two 3V batteries (type 1025).

         Replace battery compartment cover.

 Note: Replace batteries with same type only.

4. Multiple Transmitters  

Each transmitter comes factory programmed with random codes. 1-channel transmitters have one random code, 2-channel transmitters have 2 different random codes, one per button, and 4-channel transmitters have 4 different random codes, one per button. Transmitters that are purchased separately as accessories have random codes that must be changed in order to match the code of the active transmitter you are already using. Below are instructions for transferring an active code from a button on one transmitter to a button of your choice on another transmitter.

         Remove battery compartment covers of both transmitters, the one with the active code and the new transmitter that needs to receive the active code.

         Connect programming cable to both transmitters.  Line up either end of the stripped cable so 3 wires align with 3-hole terminal, then firmly insert cable.

         Press and hold the selected channel button on the transmitter with the active code. Midi and Mini transmitters have indicator lights that will blink to show that code transfer is ready.

         While keeping the transmitter button pressed, press and hold the respective channel button on the new transmitter that you want to transfer the active code to.

         Code transfer will occur in approximately 2 seconds.  If the new transmitter is a Midi or a Mini, the indicator light will illuminate continuously to show that transfer is complete.

         All buttons can be released.  Code transfer is completed.

         Cable can be removed and the covers replaced.

         Both transmitters can now be used to operate the same door.

Note: For Multi-button transmitters, be sure to carry out this procedure for all the buttons you desire to use.

For Micro transmitters, follow the same steps only there will be no LED light indication.

5. Changing the Code Transmitters

The transmitter factory preset code can be changed as follows.

         Remove battery cover from compartment.

         Connect the programming 3-prong cable to programming terminal in transmitter.

         Cross any two wires on the other end of the programming cable, one of them must be the center wire.

         Press and hold the button on the transmitter.

         Code will change in approximately 2 seconds.

         Releasing the button after the light illuminates continuously then remove the cable and replace the cover.

Note: For multi-button transmitters, be sure to carry out this procedure for all the buttons you desire to use.

For Micro transmitter, follow the same steps only there will be no LED light indication.


These instructions should only be used if there is no working transmitter.


To program remote back to the overhead motor, you open the control panel cover, there are 3 red buttons. The one that sits off by itself is the programming button, there will be a raised P next to it, you need to push and hold until all the LEDs light up and the number 2 starts to flash. Once this happens you will push and release the P button 4 times. When you are done the number 7 will be flashing, push and hold button on remote, the number 7 will pick up speed in its flash (rapidly), once this happens you can release the button on the transmitter and push the P button 1 more time to exit the programming mode. Now the transmitter is programmed back to the motor. For multiple remotes you will need the programming cable/connector and clone them to the working transmitter.


Once you have pushed and held the P button as stated above, the number 1 will flash. Then push and release P button 2 times, the number 3 will be flashing, push and hold button on transmitter. The number 3 will flash rapidly, let go of button on transmitter and push and release P 1 time to exit the programming mode.


Press and hold P button for approx. 3 seconds. LED lights eight (8), one (1) and two (2) will light up solid to form an upward arrow, press and release the P button 2 times and the six (6), seven (7) and eight (8) LED lights will light. At this time, press and hold the button on the transmitter that you would like to use and the middle (7 LED Light) will flash rapidly. Release the button on the transmitter and push P button 1 time to exit the programming mode. The transmitter is now programmed to the overhead motor and is ready to use. - Owned by 1st Garage Door Openers, Inc., an independent family owned and operated business serving the Garage Door and Garage Door Opener Industry since 1981.  Providing excellent customer service and assistance for over 25 years. We are a discount reseller of  garage door opener remotes, repair parts, keyless entry and gate operator controls for your home, business, or gated community.   We carry parts for the following garage door openers Lift-Master, Chamberlain, Sears Craftsman, Access Master, Sears Best Craftsman, Sears Automatic Door Opener, Master Mechanic, Security +, Formula 1, Garage Master, Billion Code, LiftMaster Professional, Estate Series, Premium Series, Contractor Series, Power Driver, Whisper Drive, Genie, Alliance, Norelco, Blue-Max, Lift-A-Door, Pro Max, Aladdin, Hercules, Stealth, Excelerator, Intellicode, Genie Pro, OverDrive, Python 2, Signature, Phantom, Legacy, Medallion, CodeDodger, Overhead Door, Genie Shop Vac, Stanley, Vemco, Quiet Glide, SecureCode, Lightmaker, Innovative Products, Whistler, U-Install, Popular Mechanics, Allister, Allstar, Pulsar, MVP, Challenger, GTO, All-O-Matic, Electrolift, Westinghouse, AM/11, Linear, Access Pro, Moore-O-Matic, MegaCode, Delta 3, MultiCode, Heddolf, ESP Micom, Intercontinental Dynamics, Crusader, Wayne Dalton, iDrive, Door Master, Quantum, Classic Drive, Tec Key, Martec, Monarch, Telectron and other garage door openers, and gate operators. All mentioned brand names of Garage Door openers, Garage Door opener receivers and Gate operator devices are registered trade names and trademarks of the respective entities and are only used for reference.

1st Garage Door Openers Inc.

Mesa, AZ  85203


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Garage Door and Garage Door Openers

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