Newer garage door openers have a keypad in addition to the remote which makes it slightly easier to change the code.
Marantec garage door code change.
The pin code on this device can be changed by following a few simple instructions.
If you have an older garage door that is only operated by a remote you must.
If you lose a hand transmitter it is safer to delete the tra.
Facing the back of the garage door operator the serial number can be found the right side of the chassis.
Usually a bar code number.
For marantec eos m4500e m4700e and m4900e garage door openers.
My hand transmitter has been lost or stolen.
Here are the steps you need to take to change the 4 digit pin code on your marantec m3 631 wireless keyless enty.
The marantec wireless keyless entry pad is a device that you can have installed with your garage door opener to allow you to type in a pin code to open the door.
Press and hold the 0 button on the keypad for about 3 seconds until you see the red led on the keypad blink rapidly release the 0 button when led.