How do I change the master code on my alarm?
John Thompson
Published Feb 23, 2026
How do I change the master code on my alarm?
How to change the master code of a Honeywell Alarm system
- Press 8 (the CODE key).
- Press 02.
- Enter a new four-digit master code.
- Re-enter the new code. The keypad will beep once to let you know that the code has been changed.
How do I change the PIN on my ADT keypad?
- Select Security > Menu > Toolbox.
- Enter Master Code.
- Select User management, then Master user.
- Select Change pin.
- Enter new Master Code and press OK.
- Enter new Master Code again and press OK.
How to reset the master code in Concord 4?
If you want to see what the master code is, hit 9+installer code + 3+#….You will then be in the USER CODE area. Hit the “B” key until you get to MASTER CODE, press “#” and it should show itself. If you want to clear memory and reset everything, hit 8+installer code +00 to get into SYSTEM PROGRAMMING.
What are the basic commands for Concord 4?
Table 1: Basic commands Command Instructions Disarm the system Press 1, code. Cancel an accidental alarm Presscodeor press 1, code. Arm to Level 2 (stay) Press 2, code. If the quick arm feature is on, an access code is not required. Arm to Level 3 (away) Press 3, code. If the quick arm feature is on, an access code is not required.
Where are the dealer and installer codes stored on a Concord 4?
The Master, Installer and Dealer 4-digit codes for the Concord 4 are stored as pairs of 2-digit hexadecimal integers at known consecutive addresses within a 24C256L EEPROM chip. This memory chip sits in a socket located on the alarm panel circuit board where shown (1rst image below).
How to send a fire alarm in Concord 4?
Send a police alarm Press and hold both Police buttons for 2 seconds. Send an auxiliary alarm Press and hold both Auxiliary buttons for 2 seconds. Send a fire alarm Press and hold both Fire buttons for 2 seconds. Arm system with no delay Press 2, code, 4 (Level 2), or press 3, code, 4 (Level 3).
If you want to see what the master code is, hit 9+installer code + 3+#….You will then be in the USER CODE area. Hit the “B” key until you get to MASTER CODE, press “#” and it should show itself. If you want to clear memory and reset everything, hit 8+installer code +00 to get into SYSTEM PROGRAMMING.
Table 1: Basic commands Command Instructions Disarm the system Press 1, code. Cancel an accidental alarm Presscodeor press 1, code. Arm to Level 2 (stay) Press 2, code. If the quick arm feature is on, an access code is not required. Arm to Level 3 (away) Press 3, code. If the quick arm feature is on, an access code is not required.
The Master, Installer and Dealer 4-digit codes for the Concord 4 are stored as pairs of 2-digit hexadecimal integers at known consecutive addresses within a 24C256L EEPROM chip. This memory chip sits in a socket located on the alarm panel circuit board where shown (1rst image below).
Send a police alarm Press and hold both Police buttons for 2 seconds. Send an auxiliary alarm Press and hold both Auxiliary buttons for 2 seconds. Send a fire alarm Press and hold both Fire buttons for 2 seconds. Arm system with no delay Press 2, code, 4 (Level 2), or press 3, code, 4 (Level 3).
