When I key my code into the keypad and leave the house by the front door, the alarm sounds for 20 seconds and then turns off. But now, the alarm goes off indefinitely. Once I open the door to enter the house, the alarm goes off, and I can turn it off as usual. What is the problem? Where is the 12V battery?
The 12-volt battery should be in an alarm panel box where the wires from all the zones feed into, or in a combined keypad/alarm panel. If the exit tone goes off indefinitely, that means the contact on the door may be working intermittently and should be replaced.
Updated on April 30, 2018
By Eugene Brennan