Reset Security Code

Old 11-05-04, 03:33 PM
Visiting Guest
Posts: n/a
Reset Security Code

I purchased a house couple of years ago. It has ADEMCO keypad installed by Monitronics. I don't use the Monitronics services, but wanted to use the alarm system locally. I don't have the security code for my system and I was wondering if it is possible to somehow reset the code. I called Monitronics, but they were not willing to help.

Any suggestion is greatly appreciated.

Old 11-22-04, 04:48 AM
Visiting Guest
Posts: n/a
You can try all 9's for example

Some alarms have a generic default setup code and the installers are lazy to change the code and basically leave it wide open for people who know their alarms
I might be able to help. I have a friend who installs alarms residential/commercial but I am working at the moment...
I will forward any info as soon as I get a hold of him. We're opposite shifts for now. Just hope my timing is better than my
Old 11-22-04, 08:05 AM
Banned. Rule And/Or Policy Violation
Join Date: Nov 2002
Location: Atlanta, Ga
Posts: 2,627
Upvotes: 0
Received 0 Upvotes on 0 Posts
You can get into an Ademco system's programming without the code using a back door. It's explained in the installer manual (which will depend on the model of system you have - check the big panel in the closet) You can find the manual at

The basics are:
1) Power down the system (unplug the transformer and battery)
2) Plug in the transformer
3) Within 60 seconds, press * and # on the keypad at the same time
4) You should be in programming - press #20 (this depends on the model of your system - could be #00)
5) The installer code will be read back to you (4 digits)
6) Plug in the battery

You can use the installer code to change the master code.

Good luck!

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: