D.80 Low
This is not a fault, but simply an informational status screen showing the total number of hours your boiler has spent in heating mode.
Technical description: Operating hours heating
Typical repair cost: £0 (including labour)
DIY fix possible
Press the 'Back' or 'i' button to exit the diagnostic menuNo action is required as this is a normal status message
Protect yourself from future repair bills
A boiler cover plan would cover faults like D.80 — no call-out fees, no surprises.
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