How to Find Your Code for a Home Security System

Reset the Installer Code for an Ademco Home Alarm System

• 1

  Locate the transformer. The transformer is a cube-shaped wall outlet, usually placed around the main alarm control panel.

• 2

  Disconnect the transformer.

• 3

  Open the main control cabinet and disconnect one of the large battery terminals. Unless you have a secondary power supply, this will shut down the entire alarm system.

• 4

  Reconnect the transformer and the battery in that order.

• 5

  Go to your alarm key pad within 30 seconds and press down the * and # keys simultaneously until you see "20" displayed. At the same time, you should see "Installer Code."

• 6

  Enter your new installer code while the "20" is still on the screen. Your installer code will be four digits. The keypad will beep to acknowledge the new installer code.

• 7

  Press *99 to exit the program.

• 8

  Enter your new installer code and press 1 (off). The keypad will beep once if you have successfully changed your installer code. If it doesn't beep, repeat the process.

Reset Your Master Code for an Ademco Home Alarm System

• 9

  Type in your installer code.

• 10

  Press 8.

• 11

  Press 02.

• 12

  Press in your new master code. Your master code will be four digits.

• 13

  Press 1 (off). Your keypad will beep when you successfully reset your master code. You can now activate and deactivate your alarm system.