Low
D.80 on Vaillant Atmomax

This is not an error code, but an information readout showing the total number of hours your boiler has spent providing central heating.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

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.

What the manual says

Manufacturer manual

Operating hours heating

Shared across the range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Press 'i' or the 'back' button to return to the main temperature displayNo action is required as this is a normal status message

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Related fault codes

D.81View →D.82View →

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