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Daniel Bennett

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    https://www.safelincs.co.uk

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  1. Good morning, These DETA models are quite old now and have been discontinued. It is likely that they have exceeded their 10 year lifespan and have either developed a fault or the smoke detection chamber is too contaminated to be safe. Over time the alarm's sensor will degrade and its performance will be affected as dust and even small insects collect inside the chamber making it harder to detect actual smoke if there is a real fire. Because of this most manufacturers give an estimated lifespan of 10 years for domestic alarms, which should be shown as a replacement or expiry date on a sticker on the alarm - in the case of these DETA models it will be on the back where the power connector is. Gently cleaning the alarms with your vacuum cleaner and its soft brush attachment may temporarily resolve the issue if it is caused by contamination. However, if the replacement date has been exceeded then we strongly recommend replacing the alarms even if vacuuming them seems to resolve the red light problem. The sticker on the back will also show you the exact model number and type of alarm you have, to help you find the most suitable replacement. While that particular range from DETA is no longer available, they were actually made by BRK who still make compatible alarms which you should be able to simply swap out on your existing base plates without having to change any wiring. You can find these replacement alarms here: https://www.safelincs.co.uk/search.php?q=deta+replacement Daniel Bennett
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