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I have the same issue and was wondering whether it was worth feeding a layer of the foil backed bubble wrap type insulation over the ceiling between the rafters. This would preserve the 50mm air gap above the loft conversion and should help with the insulation of the rooms in the loft. Any...

Just to clarify the 1st siren taught in OK. The next 2 sirens I had had the same problem (one plus first replacement would not learn) The second replacement would learn and work ok but the volume was much too low (I would guess at about 30dB) I could put my ear right next to it going off...

Looking at the Sirens they are on 2 different batches. And Yes I have called them on previous occasions so there is a trail. Have to say my supplier has been pretty good so far... Yale help line less so.

Yes I guess you're right. I was just looking for alternative ideas I may have missed before I go swap it yet again. C'est la vie.

Batteries all over 1.5V and when I check voltage at plug to control board it is showing 6.3V so all OK When setting tamper on/off from control board both sirens beep as expected. Sounder is clean and has been swapped with a known working one. I really think that this is the amp chip on...

I have been through the manual several times and I can see nothing that would make only this second siren not very loud. The first one taught in works fine with the same settings. I have tried exchanging the sounders with the other one that works however this is not the cause. I'm...

I have a Yale 6400 system and have added extra PIRs and sensors to it (total 15). I have had 2 faulty additional sirens (that would not learn to the system) that have been exchanged. The latest replacement learns OK and can be controlled from the control box (tamper on off etc.) however when...