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Follow Up: The alarm company came on Saturday and replaced the sensor. After the engineer left I armed the alarm and after about 4 hours it went off again without any vibration to trigger it. The panel showed the zone that was triggered was the one with sensor they'd replaced. So the...

Thanks both for your comments. The window sensor is the only device in that zone so I'll get the sensor swapped out - I hope it's not the cabling as it's channeled into the wall and under the floorboards!! :shock: Matt

Hi There's no PIR's - the windows are all vibration sensors only. Thanks Matt

Hi It was installed in 2006 and serviced in 2007. It's not been serviced again until recently when the problems began. Yes, it's the same zone that lights up every time. Thanks Matt

Hi All I recently had a problem with a loud electrical humming/buzzing coming from my Scantronic 9448+ burglar alarm. I had just had most of the house rewired and a new fusebox installed but the electrician said it was more likely to be a problem with the battery/transformer on the alarm...

Story of my life!! Thanks for the advice - I've now managed to increase the pressure to 1.5 and will keep an eye on it. Cheers

Hi Hoping someone can help me here I have the same problem with low pressure (about 0.5 bar). I inserted the T and turned it to the lock position (although I can just keep turning and turning it). I then turned the square white/grey knob (next to where the T is inserted) anti-clockwise...