
The
Marantec M3-631 Wireless
Keyless Entry System.
Marantec isn't the first company to make a
keyless entry but what a great invention. The
keyless entry has been around for a number of years but it still ranks as one of the best additions to the electric garage opener. No longer do you need to carry those bulky house keys around. Just enter four digits (if you remember them) and your in the garage. I've actually met people who depend
solely on the
keyless entry to get into their house (maybe your one of them). Not a very good idea. If the power goes out your stuck outside until it comes back on. I suggest if you do this that you at least hide a house key outside under a rock or something.
The
Marantec M3-631 Wireless
Keyless Entry is a 315MHz unit. It will work with all of the
Marantec operators that have the 315MHz radio receiver. If you look on the back of your remote control you'll see the frequency printed on it - if it is 315MHz then the
M3-631 is compatible with your operator.

You can control up to 3
Marantec garage door operators with one
keyless entry. For the
keyless entry system to work you'll need to transfer the code from a working
M3-2312,
M3-2314, or
M3-3313 remote control using a jumper cable. If you have one of the older model remotes from the ML series you'll need to request an "old to new" jumper cable when you order it.
One note of warning about the M3-631
Marantec keyless entry - there is a plastic membrane over the keypad numbers.
Do not use your car keys, fingernails, or any other sharp object to press on the numbers. If you do then it will eventually damage the keypad. Some people have said they've done this because the numbers weren't lighting up when they pressed them with their fingers. If the numbers don't seem to be responding to the pressure of your finger then take the keypad off the jamb. There's a screw on the bottom of the mounting plate - turn it and the keypad will lift off. Take the 4 screws off the back and pull the
keyless apart. Inside is a rubber membrane with nubs that depress the actuators on the control board. If these get misaligned sometimes the numbers won't light up. Make sure that it is seated so they depress properly. Check the batteries while you're in there to make sure they're not dead. Put the screws back in and tighten. Test the unit and see if it works any better (8 times out of 10 it will).
That's about it for the M3-631
Marantec Wireless
Keyless Entry System. Just another one of those things that makes our lives a little bit easier.
UPDATE: AS OF 05/01/14 the M3-631 Marantec Keyless was discontinued and replaced with the New M13-631 Keyless Entry.
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