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Knowledge Centre Security and Access Guides

What Causes False Intruder Alarms?

False intruder alarms can result from detectors, environment, users, pets or pests, doors and windows, power, communication faults or unsuitable configuration.

Black & White Property Services2 min read
what causes false intruder alarms?
what causes false intruder alarms?

What to check

  • activation zone and event history.
  • site conditions at the time.
  • user actions and opening or closing sequence.
  • detector condition, power and communications.

Plan the next decision

Diagnose the pattern before replacing equipment. Repeated activations from the same area should be investigated against its environment and use.

Define the person who can authorise work, the access conditions and the outcome required. Where the subject affects safety, security or compliance, use the competent assessment and premises-specific information required for that system.

Records and follow-up

Keep the instruction, findings, action taken, completion evidence and any open recommendation with its owner and due date.

Related work

Use the relevant commercial route, browse maintenance and contact the responsible business with the site-specific requirement.

Source

See current official guidance. Apply it to the actual premises and recheck current requirements before relying on time-sensitive details.

Frequently asked questions

What helps find the cause of repeat alarms?

Provide the alarm log, affected zone, timing and any pattern linked to people, environment or building changes. This helps target the investigation.

Should a troublesome detector simply be disabled?

Discuss the fault with the responsible team and competent provider. Any change needs its effect on protection understood and recorded.