Low
d.80 on Vaillant ecoMAX 622

This code is simply an information display showing the total number of hours your boiler has been running since it was installed; it is not an error and requires no action.

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

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

From this model's manual
Verified against the Vaillant Ecomax 613 installation & service manual, page 47.
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

This fault may be fixable without an engineer. Check your manual first.

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d.81View →d.82View →

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