I have a Yale 3000 wireless alarm system that has worked well for several years. Recently, I have started o suffer a spate of false alarms (very annoying for neighbours when I am away from the house and at night)
I have cleaned all of the PIRs, the siren box and the keypad and replaced all of the batteries.
Most recently, no faults occurred for a two week period but the problem has now recommenced.
Could this be a tamper control fault on the siren box caused by expansu=ion/contraction because of the hot weather. Odd if that is a suggestion because the box is mounted on a wall that does not face the afternoon sun and I would have exoected all of the movement to have subsided by nighjt-time.
The false alarm does not commence on setting the system and can occur after several hours of after just half an hour or so.

Brian, August 2006

Red triangle light on my yale gsm alarm?

Michael conlon, October 2013

Have you checked the bell box for water getting in?
The manuals are on www.alarmhelp.net

Alarmman, October 2006