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The Daily Insight

Why does my alarm go off when there is a power cut?

Author

Christopher Pierce

Published Feb 12, 2026

Why does my alarm go off when there is a power cut?

However, if your alarm does go off during a power cut, you have a fault. This means the back up battery which is meant to keep the alarm running, is unable to keep the alarm system running therefore setting the alarm off. To avoid any faults with your burglar alarm, it needs to be regularly serviced.

How do I reset my house alarm after tampering UK?

How to reset a house alarm after tamper?

  1. Remove the cover.
  2. Remove the battery.
  3. Press and hold the tamper button.
  4. Insert the battery while holding the tamper button. The LED light will flash. Hold the button until it stops flashing.
  5. Replace the cover.

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No matter what, no matter when: The Bosch Service Team is here to support you. Reach us at 1-800-944-2904 or text “SUPPORT” to 21432 for quick access to online resources such as owner manuals, servicer finder, FAQs, how-to videos, warranties, parts & accessories search. The Bosch Appliance Service Plan.

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Browse our FAQs, use and care tips, troubleshooting instructions, and more. Please contact us if you can’t find what you’re looking for. Bosch technicians and authorized service providers are trained on Bosch engineering and provide friendly, efficient service.