How do I change a master code on an L5000 or L5100?
Follow these instructions to change the master code on your Honeywell LYNX Touch alarm system. The touchscreen on the L5000 and L5100 makes it easier than ever to program your security system. With the system in a disarmed state, press “More” to go to the second page of the home screen, and then select “Tools.” Enter your existing 4-digit master code (default is 1234) when the keypad displays on the screen. Then, select the “Users” icon and you will see options to change the Master, Babysitter, and Duress codes, as well as the ability to add or edit additional user codes. If you do not know the existing master code, you can also change the master code using the installer code. When you select “Tools” and the keypad is displayed, enter the Installer code (default is 4112) instead of the master code to access the system programming menu. Advance to the second page of the system programming menu, and you will see an option to “Reset Master Code” which will change the master code to the factory default of 1234. Then you can enter the master programming menu as described above to change the master and user codes.
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