I've had the system 25 months. Recently it started arming itself about once a day. It will also go off (alarm mode) every couple of days when not armed. Scares the cat. I shut it off with the keychain remote, and no zone indicator lights are on, telling me the ps561 is going off by itself. I have 2 door sensors, 2 motion detectors and 2 floodlight detectors in my shop. I have changed batteries in all devices, and reset all units twice. All telephones are land line or 5.8's. Any ideas?
Thanks, Tinroof