AL46

You are all right it was the smoke alarm - situated close to the intruder alarm control box so difficult to differentiate betwenn the 2 especially with my hearing. Thanks all

I didn't think it was connected to the smoke alarm, just an intrusion alarm

I have a BT Home Monitor VP1000 which started to beep a few days ago (3 per minute) but with no fault registered. I checked the manual and tried to switch off for 4 hours but did ot work. It also ays in the manual that it will not beep at night but it does. I have now switch off at the mains and also disconnected the battery and it is still beeping. It is driving me and the family nuts! Any ideas to resolve the problem?