BoilerFaultCodesWhat the manual says
Manufacturer manualNot a fault code Service mode selected to max, press service button to return to normal.
What causes this fault?
This occurs when the service button has been pressed and held, intentionally putting the boiler into a manual test mode. It is physically caused by the control board staying in a 'high fire' setting to allow an engineer to measure gas pressures. The boiler hasn't broken down; it is simply waiting for a command to return to its normal heating program.
DIY fix possible
Locate the service button on the boiler control panelPress the service button once to exit the testing modeEnsure the boiler returns to normal operation with the flashing indicator light now solid or off as per usual
Avoid the next call-out bill
A cover plan would handle faults like 5 pulses No light: no call-out fees, no surprise bills.
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