Hi, I posted a question a month ago, and Whistle gave me advice. Since then I have the same problem, IE, alarm goes off and registers "tamper" however it resets immediatly every time. Today,its done it 4 times, having changed the battery as Whistle advised.It always goes off when I use light switch near control box, and it can then do it several times afterwards as today, within minutes of each reset.I somehow still think the light switch has something to do with it?It has gone a month since it last occurred and battery change.I have a PIR near the swich, but have changed that also.Any ideas gratefully recieved,as it resets imediately, i cannot trace fault.