Blue light Fast flash with 5 pulses, Reset button Flashing — Ignition lockout

What does Blue light Fast flash 5 pulses, Reset button Flashing mean?

The blue indicator light flashes rapidly with five pulses, and the reset button is also flashing, indicating the boiler has entered an ignition lockout state. This means it tried to ignite multiple times and failed for safety reasons.

• Insufficient gas supply or incorrect gas pressure
• Blocked flue or combustion issue (CO2 level)
• Faulty ignition electrodes or connections
• Gas valve malfunction, low water pressure, or air trapped in the system
• Blocked heat exchanger, pump issue, water leaks, or faulty safety thermostats

Click steps to track your progress.

1. 1

   Check that the gas supply to the property and boiler is turned on.

2. 2

   Ensure the boiler's water pressure is within the recommended operating range (check the system pressure gauge).

3. 3

   Press the flashing reset button to attempt to clear the lockout.

4. 4

   If the fault reoccurs, contact a qualified Gas Safe engineer to check gas pressure, flue, ignition system, and water circulation.