T
The Daily Insight

How do I change the master code on Vista 10SE?

Author

Samuel Coleman

Published Feb 21, 2026

How do I change the master code on Vista 10SE?

Via-30PSE and Vista-10SE

  1. Enter Master Code then press 8.
  2. Press 2.
  3. Enter new Master Code twice.
  4. Keypad beeps if successful.

How do I reset my Ademco Vista 20P master code?

To change the code, enter in the following command:

  1. [Current Master Code] + [8] + [02] + [New Master Code] + [New Master Code Again]
  2. The keypad will produce a long tone to confirm that the code has been successfully changed.
  3. Test the code.
  4. [New Master Code] + [3]
  5. The system should begin to arm.
  6. [New Master Code] + [1]

How do I reset my Vista 15p?

You can factory default a Honeywell VISTA P-Series System by activating the *97 command within system programming. A factory default will reset the Master Code to 1234, reset the Installer Code to 4112, delete any other user codes, clear all programmed zones, and restore default settings.

How do you change user code on Ademco?

If you ever need to get back into programming mode, enter the (installer code), 8, 00. To add user codes, first follow the steps in your installation manual to add a master user code. Notice that most Ademco panels require you to repeat the new code a second time to allow changing of the master code.

How do you Exit programming mode on Ademco?

To exit programming mode, press “* 99”. The keypad should return to an idle display, with green “Power” and “Ready” lights. If you ever need to get back into programming mode, enter the (installer code), 8, 00. To add user codes, first follow the steps in your installation manual to add a master user code.

What is the master code for an Ademco alarm?

Once the master code is in the system, it is used to add all the other user codes. Most Ademco alarm systems follow a similar format for code changes. Enter the (4-digit master code), followed by 8, (2-digit user number), (new 4-digit code). User numbers range from 01 up to 08, 16, or higher, depending on the size of the system.

How do you disconnect a backup battery from an Ademco alarm?

Disconnect one lead from the backup battery in the main panel. The connectors just push on and pull off, no tools needed. Remove AC power from the panel. This can be done by removing one of the transformer wires from terminal 1 or 2 on the circuit board. You’ll need a screwdriver for this method.