Low
d.80 on Vaillant Ecomax Condensing 600/800 series

This is not an error code, but simply a display showing the total number of hours your boiler has spent running since it was installed.

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.

Technical description

Number of heating system operating hours (Total) (ecoMAX 800)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

d.81View →d.82View →

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