How do you disconnect a backup battery from an Ademco alarm?
David Ramirez
Published Feb 24, 2026
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.
Do you need a code for an Ademco Security system?
To operate any home security system, you need a valid security code programmed into it. Alarm system manuals often get lost, along with other paperwork, so you may not know any codes to the system. Fortunately, your Ademco home alarm system is easy to program, and Ademco manuals are readily available.
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.
Where do I find the Ademco alarm sticker?
Use the key or a screwdriver, whichever works. Look inside the main panel lid for a sticker. This sticker shows a connection diagram of the alarm system, along with the model number at the bottom. Your Ademco home alarm system may be a Via, Vista, or other line of panel.
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.
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.
Where do I find the model number on my Ademco alarm system?
Use the key or a screwdriver, whichever works. Look inside the main panel lid for a sticker. This sticker shows a connection diagram of the alarm system, along with the model number at the bottom. Your Ademco home alarm system may be a Via, Vista, or other line of panel. Panels are numbered within their product line.
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.