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RED LED

LEARN BUTTON

Lights Flash

RED LED

Flash

DESCRIPTION:

The MMT103 Code Safe entry remote is a wireless radio control designed for use with Mighty Mule 

garage door openers and can also be programmed to your Mighty Mule gate openers. One remote for 

two or three devices.
Each of the remote’s three buttons will send a unique code when pressed. All buttons can be used to 

activate an individual Mighty Mule garage door opener, multiple Mighty Mule garage door openers or 

Mighty Mule garage door opener(s) and gate opener(s).

MMT103

3-BUTTON ENTRY REMOTE

Instructions

PROGRAMMING:

Press the operator’s LEARN button (S3) until 

the operator’s red LED flashes once and the 

light turns on. A remote must be added while 

the light is still on (15 seconds).
Send a signal from the desired button on the 

remote. The operator’s light and the red LED 

will flash once if the remote was added.

Repeat to program additional buttons for other 

garage door openers.
After programming, test the remote from various 

locations. Be sure the door or gate areas are clear. 

Activate the remote and verify that the receiver 

triggers the opener(s).

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PRINTER’S INSTRUCTIONS:

 

INSTR, INSTL, MMT103 - P/N: 10015841 C - INK: BLACK - MATERIAL: 20# MEAD BOND - SIZE: 8.500” x 11.00” - SCALE: 1-1

PROGRAMMING THE REMOTE TO THE GARAGE DOOR OPENER

DELETING A REMOTE FROM THE GARAGE DOOR OPENER OR GATE OPENER

PROGRAMMING THE REMOTE TO MIGHTY MULE 7TH GENERATION AUTOMATIC GATE OPENER

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If you have a Mighty Mule gate opener, you can program one of the 
buttons to open the gate also.

Press and hold button 1 and button 3 at the same time for 5 
seconds. The LED will turn on, then release the buttons. 

Press and release the button that you want to learn the gate 
opener code to.

Hold the gate opener remote with the front/top facing the side of 
the MMT103. Press the button on the gate opener remote and 
the LED on the MMT103 will blink twice when it has successfully 
learned the code. 

The button you programmed will now transmit the gate opener code as 
indicated by the LED being solid on when the button is pressed.

PROGRAMMING/LEARNING A GATE OPENER REMOTE

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Button #1

LED

Button #3

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Press and release the button you 
want to learn the gate operator code

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Press and hold the gate operator remote button 
until the LED on the MMT103 blinks twice 

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LED

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DELETING A DIP SWITCH CODE

Press and hold button 1 and button 3 at the same time for 
about 5 seconds. The LED will turn on, then release the 
buttons. 

Press and hold the button you want to delete a code from for 
5 seconds, then the LED will blink twice indicating the DIP 
switch code was successfully removed. 

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2

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Press and hold the button you want 
to delete a code from for five seconds.

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Button #1

LED

Button #3

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Copyright© 2019 Nortek Security and Control, LLC

10015841 C

When the red light on the remote glows dimly, or fails to light at all 
when the remote is activated, the batteries need replacing.

Twist a coin, visor clip or screw drive in slot to open case.

Lift off top of case.

Carefully remove the circuit board.

Remove old battery and properly dispose them.

Replace battery with new Type 2032 battery – PLUS SIDE UP.

Re-assemble the remote.

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Mighty Mule® is the retail brand of Nortek Security and Control, LLC
5919 Sea Otter Pl • Carlsbad, CA 92010

Mighty Mule Sales: 800-543-4283 • Fax 850-575-8912

Mighty Mule Technical Service: 800-543-1236 

For more information on Mighty Mule’s full line of Automatic Gate Openers and Access Controls visit 

www.mightymule.com

REPLACING REMOTE’S BATTERY

If a remote is already programmed to the opener and you want to delete it, follow the same procedure as PROGRAMMING THE REMOTE 

above. The opener will recognize the remote and delete it from memory. 

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 WARNING

KEEP BATTERIES OUT REACH OF CHILDREN. Swallowing batteries can lead to serious injury or death. If you suspect 
someone has swallowed a battery, go to the hospital immediately. Do not induce vomiting or eat or drink anything. 
For more information, call the National Battery Ingestion Hotline: 202-625-3333. 
The battery identification number for this product is CR2032.

WARNING:

 Changes, modifications or adjustments not expressly approved by Nortek Security and Control, LLC could void the user’s authority to 

operate this equipment. There Are No User Serviceable Parts.

NOTICE:

 This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause 

harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

This device complies with Industry Canada License-exempt RSS standard. Operation is subject to the following two conditions: (1) this device may not 

cause harmful interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.

MIGHTY MULE LIMITED WARRANTY

This product is warranted to the consumer against defects in material and workmanship for one year from the date of purchase. This warranty applies 

to first retail buyers of new devices. Mighty Mule will repair, or at its option, replace, any device it finds that requires service under this warranty, and will 

return the repaired or replaced device to the consumer at the Might Mule’s cost. For warranty service and shipping instructions contact Mighty Mule Tech 

Service. Devices must be sent to Mighty Mule for service at owner’s expense. The remedies provided by this warranty are exclusive. Implied warranties 

under state law are to the one year period of this written warranty. Some states do not allow limitations on how long an implied warranty lasts, so the 

above limitation may not apply to you. In order to be protected by this warranty, save your proof of purchase and send copy with equipment should repair 

be required. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
All products returned for warranty service require a Return Product Authorization Number (RPA#). Contact Mighty Mule Technical Services at 1-800-543-

1236 for an RPA# and other important details.

S4

S3

S2

LED1

LED2

LED3

Press the gate opener’s LEARN button (S3) located 

on the control board.
Press the desired button on the remote to 

complete programming process. The remote is now 

programmed to the gate opener. 

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