BoilerFaultCodesYour boiler has detected a temporary internal communication or sensor timing error and is essentially waiting to see if it clears itself.
This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.
Technical description: Temporary fault code (Refer to section 7.10)
What causes this fault?
This fault occurs when the boiler's internal electronics detect a brief interruption or a glitch in the data being sent between sensors. The most common cause is a sensor that is starting to wear out or a small electrical disturbance on the main control board that makes the system pause to re-check its readings.
DIY fix possible
Wait for a few minutes to see if the error clears automaticallySwitch the mode selector switch to 'OFF/RESET' for 10 secondsTurn the selector switch back to the 'ON' position
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