BoilerFaultCodesTechnical description
Ionisation failure during boiler operation: After 4 restarts during 1 heat demand
What causes this fault?
This fault occurs when the boiler successfully lights but cannot confirm that the flame is still burning while it is running. The most common reason is a worn-out or carbon-coated sensing probe that can no longer detect the heat of the fire, though it can also be caused by an incorrect mixture of gas and air.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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