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uk Home & property emergencies alarm going off and wont stop • intruder alarm sounding • burglar alarm stuck on • house alarm wont silence • alarm panel not responding • fire alarm sounding at home • smoke alarm keeps going off • smoke detector wont stop • interlinked alarms all sounding • cant verify why alarm is sounding • false alarm but unsure • loud external siren • keys locked out alarm sounding • neighbour burglar alarm going off • home alarm malfunction • power cut alarm sounding • alarm tamper warning sound • cant find the triggered sensor • alarm keeps rearming itself

What to do if…
your burglar or fire alarm system is sounding and you can’t silence it or verify why

Short answer

Treat it as real until you’ve ruled out danger: get everyone to a safer position and, if there’s any sign of fire/smoke/heat or a possible intruder, leave and call 999.

Do not do these things

  • Don’t stay inside “to fix the alarm” if you smell smoke, see haze, feel unusual heat, or anyone feels unwell.
  • Don’t open doors that feel hot, or go searching through rooms if you suspect someone might be inside.
  • Don’t silence/disable alarms and then go to sleep or leave the home without a reliable way to stay alerted.
  • Don’t repeatedly guess keypad codes (some systems escalate tamper alerts).
  • If it’s someone else’s alarm, don’t force entry or confront anyone yourself.

What to do now

  1. Get to a safer position first. Move everyone to a place where you can think clearly (outside, or a locked room with an exit route). Take your phone; grab keys only if they’re within easy reach.
  2. Do a fast danger check without roaming. From where you are, look/listen/smell for smoke, burning, unusual heat, gas-like smells, breaking glass, voices, or movement. If you’re in any doubt, leave.
  3. If you suspect fire or can’t quickly rule it out:
    • Get out, stay out, call 999.
    • If you must pass a door, feel it with the back of your hand first; if it’s hot, don’t open it.
  4. If you suspect an intruder or see signs of a break-in (forced door/window, someone lurking, fresh damage):
    • Do not go looking. Get to a safer place and call 999.
  5. If you’re confident it’s likely a nuisance smoke alarm (e.g., cooking fumes) but it won’t stop:
    • Find the unit that seems to be triggering and use its Hush/Silence/Test button if it has one.
    • Ventilate the area (open windows/doors) only if it’s safe and you’re confident there’s no fire.
    • If it still won’t stop and you cannot verify why, revert to Step 3 (evacuate and call 999).
  6. If it’s your intruder alarm and you’re safe, try only the simplest “safe” silencing steps:
    • Go to the keypad/control panel and enter your disarm code once.
    • If it’s monitored, call your alarm company/monitoring centre and tell them you cannot silence or verify the cause. Ask them what they see on their end and what they want you to do next.
    • If you have a keyholder (someone trusted with access), contact them once you’re safe so the property can be checked appropriately.
  7. If you’re in rented or managed housing:
    • Once you’re safe, contact your landlord/agent/building contact. If the alarm is communal or interlinked, follow any building instructions you’ve been given.
  8. If it’s not your alarm (neighbour/business):
    • If you believe there is immediate danger (fire, someone breaking in right now), call 999.
    • Otherwise, treat it as a noise nuisance: report it to the local council (environmental health/noise nuisance team). Councils have powers to deal with misfiring audible intruder alarms, but the response may not be immediate.

What can wait

  • Opening panels, isolating wiring, or doing “deep troubleshooting”.
  • Working out “why it happened” or arguing with neighbours/landlords.
  • Insurance notifications and complaints.

Important reassurance

When alarms won’t stop, it’s normal to freeze, feel embarrassed, or feel pressured to “fix it quickly”. Choosing safety-first (evacuating and calling for help if you can’t verify) is a reasonable, protective response.

Scope note

These are first steps to stabilise the situation and avoid harm. After it’s safe, you may need your alarm installer/maintainer, landlord/agent, or the council (for nuisance alarms) to resolve the underlying fault.

Important note

This is general information, not professional fire safety, security, or legal advice. If you cannot quickly confirm it’s safe, prioritise getting out and contacting emergency services.

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