--- title: Change Installer Code description: Change Installer Code --- [Skip to content](https://support.geoarm.com/honeywell/l3000lynxplus/changeinstallercode#main-content) English Show submenu for translations ![geoarm-by-alarmclub-logo-2024-transparent.png\]](https://support.geoarm.com/hs-fs/hubfs/geoarm-by-alarmclub-logo-2024-transparent.png?height=50&name=geoarm-by-alarmclub-logo-2024-transparent.png) Open main navigation Close main navigation - English Show submenu for translations - Visit GeoArm.com Visit GeoArm.com Hello. How can we help? - There are no suggestions because the search field is empty. 1. [Support Center](https://support.geoarm.com/?hsLang=en) 2. [Honeywell](https://support.geoarm.com/honeywell?hsLang=en) 3. [L3000 Lynx](https://support.geoarm.com/honeywell?hsLang=en#l3000-lynx) # Change Installer Code To Change the Honeywell LYNX Plus L3000 Installer Code There are 2 ways of changing the installer code: Option # 1 1\) enter Installer Code + 800 2\) enter \*20 3\) enter new 4-digit installer code 4\) enter \*99 to exit the programming Option 2 1\) Remove the power transformer & backup battery so there is no power to the LYNX L3000 control panel. “To verify this make sure there is no power to your keypad”. 2\) Next, you can power your L3000 back on by first plugging in your alarm backup battery followed by your transformer within 40 seconds and you should see AC or D1 on the keypad. 3\) Press and hold \* and # for three seconds on the programming keypad from there you should see INSTALLER CODE 20 or 20.  4\) Press \*20 4112 (You should hear 3 beeps) this will indicate that you have successfully reset your Honeywell LYNX Plus L3000.  Once you have completed any programming necessary you can press \*99 to exit the programming mode of the Honeywell L3000.   Note: This method can only be achieved when the system is disarmed, if the system is armed you will not be able to do any kind of programming.  ![l3000-resideo-honeywell-home-lynx-plus-wireless-control-panel-10](https://support.geoarm.com/hs-fs/hubfs/l3000-resideo-honeywell-home-lynx-plus-wireless-control-panel-10.png?width=600&height=600&name=l3000-resideo-honeywell-home-lynx-plus-wireless-control-panel-10.png)   - 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