Low
d.62 on Vaillant ecoFIT Pure 425

Your boiler is currently running at a lower temperature because your heating controls have told it to enter an energy-saving night mode.

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

Night set-back

From this model's manual
Verified against the Vaillant Ecofit Pure 830 installation & service manual, page 31.
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 your external room thermostat or timer settingsAdjust the 'Night' or 'Set-back' temperature on your controller if the house is too coldEnsure the clock on your heating programmer is set to the correct time

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