Boiler shows A06, flame detected when there should be none (false flame).

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Moisture or dirt on ionisation electrode, Faulty ionisation circuit on PCB, Earth fault, Flame signal from external source

Safety: Isolate power and gas before working on the burner and electrodes.

Clean ionisation electrode: Remove and clean the electrode and its insulator. Ensure it is dry and free from carbon deposits.
Check earth connection: Verify that the boiler is properly earthed and that earth connections are tight.
Inspect wiring: Check the ionisation lead for damage or tracking to other components.
PCB test: If the electrode and wiring are sound, the PCB flame detection circuit may be faulty and require replacement.

Hard 4/5

Ionisation Electrode

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