Figures reported in October 2026 show North Wales Fire and Rescue Service attended 6,644 incidents in 2025–26, the highest annual total in 13 years. Of these, 3,205 were recorded as false alarms: around 48% of all callouts.
The figures cover the whole North Wales Fire and Rescue Service area. They are not a breakdown for each county, and the latest totals were reported as provisional. Even so, they highlight a practical issue for businesses, care settings, schools, landlords and households: unwanted fire alarm activations can disrupt a day and use emergency-service resources.
The answer is not to make detection less effective. It is to find the cause, manage the system properly and reduce repeat activations without compromising safety.
What counts as a false fire alarm?
“False alarm” can describe different situations. Some calls are made in good faith when someone believes there may be a fire. Others are malicious. Apparatus-related activations include alarms triggered by equipment when there is no fire.
An unwanted activation is an alarm signal that occurs when there is no fire requiring a response. It may be caused by the environment, a system fault, unsuitable detector selection or user error. A genuine fire alarm that has been triggered accidentally still needs to be treated seriously until the cause has been checked safely.
Never assume an activation is false just because similar alarms have happened before. Follow your fire procedure every time.
The impact goes beyond the callout
An unnecessary response uses fire and rescue service time that may be needed elsewhere. At a premises, an activation can interrupt teaching, care routines, customer service, production or deliveries. Staff may need to account for people, manage visitors and investigate the cause. Repeated disruptions can also make people less responsive to alarms.
There may be further costs in staff time, lost trading or delayed work. The size of that impact depends on the premises and incident; it is not the same for every organisation. The important point is that repeat activations should be recorded and investigated, not dismissed as routine.
Common causes of unwanted activations
Start by checking what was happening near the detector when the alarm operated. Common causes include:
- Dust and building work: dust or debris can contaminate detection equipment.
- Steam and cooking vapour: vapour may reach a detector near a bathroom, kitchen or process area.
- Aerosols: sprays and similar products can affect some detectors.
- Poor detector selection or placement: the detector may not suit the room’s use or environmental conditions.
- Insects or debris: ingress into a detector can interfere with operation.
- System faults: damaged wiring, ageing components or other faults may cause repeated signals.
- User error: a call point may be operated accidentally, or procedures for testing, silencing or resetting may not be followed.
A single incident may have more than one contributing factor. For example, a room’s use may have changed, while the detector type and position remained the same.
Why detector type and position matter
Fire alarm systems need to suit the building, its layout and how people use it. A detector installed in the wrong location, or one that is unsuitable for the room’s normal conditions, may be more likely to activate unnecessarily. Moving a detector or changing its type without a competent assessment can create gaps in protection.
Ask a qualified specialist to review recurring activations alongside the fire-risk assessment, room use, ventilation and detector locations. The aim is to reduce unwanted alarms while preserving appropriate early warning, not to make the system less sensitive without justification.
How to investigate and record an activation
Follow your site’s fire procedure first. The alarm should initiate the appropriate evacuation. Do not delay evacuation to investigate, and do not ask anyone to enter an area if it may be unsafe.
If your procedure allows a trained, authorised person to investigate safely, use the control panel and zone plan to identify where the alarm began. Look for signs of fire, such as smoke, heat or unusual smells. If you find signs of fire, leave by the nearest safe exit and call 999. State clearly that you have investigated and are reporting a fire, not only that an alarm is sounding.
If no signs of fire are found after a suitable check, record the event in the fire alarm logbook. Include:
- Date and time.
- The panel indication, zone and device location, where available.
- What was happening in or near the area.
- The apparent cause, if established.
- The action taken and any follow-up required.
Report the activation to the person responsible for fire safety. Review repeated events for patterns. A recurring signal from one detector, for example, may point to a fault or a local environmental cause that needs attention.
North Wales Fire and Rescue Service provides guidance on investigating an automatic fire alarm activation and common causes and potential solutions. Follow your own premises’ risk assessment and procedures as well.
Manage fire alarms during building work
Plan fire protection before work starts. Tell contractors about the alarm arrangements, identify affected areas and agree how any necessary system changes will be controlled. If the system is monitored, follow the agreed procedure for notifying the alarm receiving centre before testing or maintenance, then confirm when the work is complete.
Only use temporary detector covers when appropriate and under a controlled process managed by competent people. Record which devices are affected, brief workers on what to do if they discover a fire, and remove covers as soon as the work permits. Make sure the system is restored and checked afterwards.
Never leave detection disabled, covered or isolated without proper controls. If a device or circuit needs to be taken out of service, get competent advice, document the impairment, put suitable temporary safety measures in place and restore protection promptly. An alarm that is unreliable or unavailable can put occupants at risk.
Prevention checklist
Use this checklist to reduce avoidable activations:
- Keep detectors clean and free from obstruction, following the maintenance plan.
- Keep cooking vapour, steam and aerosols from reaching detectors where possible.
- Brief staff, residents and contractors on alarm procedures.
- Plan hot, dusty or disruptive work with the person responsible for fire safety.
- Keep the fire alarm logbook up to date and review recurring patterns.
- Check that detector locations remain suitable when rooms or processes change.
- Arrange investigation of faults and repeated unexplained activations.
- Confirm that monitoring and escalation arrangements are understood and current.
- Never disable detection as a shortcut to stopping nuisance alarms.
Monitoring and an agreed response
Monitored signalling can send alarm information to an alarm receiving centre, where agreed procedures determine what happens next. It can support prompt notification and a clearer response plan. It does not replace evacuation, a fire-risk assessment or the need to follow the fire service’s current guidance.
Make sure staff know what to do when a signal occurs, who is authorised to investigate or reset the system, and when to call 999. Confirm arrangements with your monitoring provider and check current local response procedures. Do not assume an automatic signal alone guarantees a fire-service response.
When to call a specialist
Arrange professional help if activations keep recurring, the panel shows a fault, the cause is unclear, or building work or a change of use may have affected coverage. Get advice before altering detector type, location, programming or system operation. A competent engineer can inspect the equipment, identify faults and recommend appropriate corrective work.
Dragon provides fire alarm servicing, fault-finding and maintenance for commercial and residential premises. Our fire services team can help review your system and discuss suitable next steps. Dragon holds NICEIC and SSAIB accreditations as company credentials. Free surveys are available.
For clarity, Risco intruder alarm packages are a separate service from the fire alarm work discussed here. Selected packages start at £499.99 + VAT, subject to terms and conditions.
Speak to Dragon
If your premises has repeated unwanted activations or needs a fire alarm maintenance review, contact Dragon Security & Electrical Ltd on 01492 330330 or request a survey.
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