BoilerFaultCodesThis is not a fault, but simply an informational status screen showing the total number of hours your boiler has spent in heating mode.
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: Operating hours heating
What causes this fault?
This is an informational status code rather than a mechanical failure. It is triggered when a user or engineer navigates to the diagnostic menu to see how much work the boiler has done specifically for central heating. It simply records the cumulative time the burner has been active to provide a history of the appliance's usage.
This code may be checked more frequently during the winter months when homeowners are more likely to monitor their heating usage and energy consumption.
DIY fix possible
Press the 'Back' or 'i' button to exit the diagnostic menuNo action is required as this is a normal status message
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A boiler cover plan would cover faults like D.80 — no call-out fees, no surprises.
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