Technical description
Temporary fault code (Refer to section 7.10)
What causes this fault?
This fault occurs when the boiler's internal computer experiences a brief communication delay or a 'software hiccup' between its electronic components. It is usually caused by a momentary fluctuation in the electrical supply or a temporary glitch in the main control board's processing cycle. The boiler displays these numbers while it pauses to perform an automatic self-check and reboot sequence.
DIY fix possible
Observe the boiler to see if it clears the code automaticallyPress the reset button or turn the mode selector to 'OFF/RESET' for 5 secondsIf the fault persists or recurs frequently, contact a Gas Safe engineer to inspect the PCB