How do I reset GE Simon 3 Install Password to Default Password?

First you need to have the installer code. Open the fromt panel of thealarm and enter in "4-3-2-1" (Default installer code) If it accepts this number then you can begin to program the doors and windows. If you don't knowtheinstaller code you mayneed to default the system and reprogram everything. If you contact meIcan walk you through the processor.

AlarmProfessor.com

2. Unplug the transformer and disconnect the battery.
3. Simultaneously press and hold Cancel, Clock Set, and
Minutes +.
4. Restore power to the panel with either the battery or the
transformer while pressing these three buttons. The
panel announces “Hello. System XX OK.” Release the
buttons.
5. Connect the remaining power source to the panel.

- AlarmProfessor.net

You neet to reset the system to factory defaults. Contact me and I can go through it for you.

AlarmProfessor.net

I am sure you already guessed this but it appears someone has changed the default installer code. Using the default installer, dealer, or master codes defeat the purpose of a security system as most criminals know the default codes. The only way I know of to regain control of this panel is to reset it to factory defaults. This does mean that you will have to completely re-progam the system. I would document as much stuff as you can from the display before resetting it. If you don't have a copy of the installation manual I am providing a link below. Hope this helps.

http://www.home-technology-store.com/assets/PDF/GE/Simon-Install.pdf

contact the Professor and he can help you.

AlarmProfessor.net

Here is the manual. See System Programming on page 11 for default codes.

Is your Simon 3 new or used? The default Utility Access Code 1 or 2 (i.e. the code you use when you open up the cover) is 654321, 54321, 4321 or 321. The default Master Access Code (i.e. the code you use to arm / disarm without opening the cover) is 123456, 12345, 1234, or 123. The length of the code depends on option 54. Default is 4 digits. If it's a used one that has non-default settings, you can reset memory to factory defaults.

The default master access code is 1-2-3-4, try it to see if this works.

In order to do this, you must have the "installer code". This is not to be confused with your master code which you use to disarm your system. Once you have this code, enter it when prompted, press delete, press sensors, when proper sensor is announced press done to accept, system announces that sensor "x" has been deleted. There is a default "installer code" (1234 or 4321) but many suppliers such as ADT change it to prevent owner tampering.

according to the manual, the master password is one of the following:
654321, 54321, 4321 or 321.
enter those when you open the panel cover.