Hello,

We have an old, now unmonitored ADT alarm that was in the house when we moved in several years ago.

We have been using the alarm system as a regular unmonitored set-up fine until 2 days ago.

Distracted by the kids, I accidentally typed in some numbers on the key-pad, which weren't my code. I 'escaped' this code to set the alarm properly - and that was fine.

However, now when we walk past certain (but not all) PIR sensors in the house the ADT keypad beeps.

I can't think what on earth I did to do this, and can't find any way of fixing it - please help!

Thanks,

Could be failure to communicate, or Telco Line Monitor, needs to be disabled to silence. ## a couple of time may silence for a while. DSC? Ademco? Photo?