BoilerFaultCodesTechnical description
Test program where the appliance is operated with minimum gas volume (ignition gas volume) after successful ignition.
What causes this fault?
This is not actually a fault, but a routine self-test triggered by the boiler's internal computer to ensure it is running as efficiently as possible. It occurs when the system checks that the gas valve and fan are working correctly at the lowest power level after the flame has lit. You do not need to take any action, as the boiler is simply fine-tuning its performance.
DIY fix possible
Wait for the program to complete automaticallyPress the 'Back' or 'Reset' button if you need to exit the menuEnsure your heating controls are calling for heat if the boiler returns to standby
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