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Smoke, Fire & Gas Detection FAQs

Why is my smoke alarm flashing red?

The reason why your smoke alarm has a red (or green) flashing LED light can be different for each make of alarm. Check the manual for your smoke alarm to find out why; you can usually find these on the technical data tab on most of our smoke alarms.  

Here are some examples of why smoke detectors periodically have a flashing red or green LED light without an alarm sounding;

  • To indicate that the alarm is receiving power and is operating normally
  • An end-of-life or low-battery warning 
  • To indicate the alarm is in hush mode or that there is a fault with the alarm

View all smoke, fire & gas detection FAQs


 

Reviewed: 14/09/2023 (doc:536 V1.0). Our articles are reviewed regularly. However, any changes made to standards or legislation following the review date will not have been considered. Please note that we provide abridged, easy-to-understand guidance. To make detailed decisions about your fire safety provisions, you might require further advice or need to consult the full standards and legislation.

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