Step by step

  1. Look for the tripped switch

    Identify the RCD or circuit breaker in its off or middle position from the labelled front panel.

  2. Disconnect likely appliances

    Unplug recently used portable appliances on the affected circuit where it is safe to do so.

  3. Reset once

    Move the switch fully off, then back on, following the consumer unit's instructions.

  4. Narrow down the cause

    If it stays on, reconnect appliances one at a time. Leave any appliance that makes it trip disconnected.

  5. Arrange a check

    If the RCD trips again or the cause is unclear, ask a qualified electrician to inspect it.

Know when to stop

When to stop and call a professional

Stop immediately for smoke, burning smells, visible damage, wet electrical fittings or repeated trips. Do not remove the consumer-unit cover or attempt wiring repairs.

General information for a UK home; always follow your product instructions and current local rules. Images are illustrative, not technical diagrams.