Low
S.76 on Vaillant ecoFIT Pure 835

Your boiler is reminding you that it is time for its regular service or that the water pressure inside the system is slightly outside the ideal range.

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

Maintenance message: Check the water pressure

From this model's manual
Verified against the Vaillant Ecofit Pure 830 installation & service manual, page 33.
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

Check the pressure gauge on the front of the boiler display.If it is below 1 bar, use the external or internal filling loop to top the system up to between 1 and 1.5 bar.If the pressure is correct, this is simply a service reminder that requires a gas safe engineer to reset.

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