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.

Technical description

Night set-back

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

Find a Gas Safe engineer
Search the official register →

Related fault codes

d.00View →

Related guides you might find useful

Yellow or orange flame — CO safety

Safety-critical — turn off, read this.

Read →

Is boiler cover worth it?

Break-even maths on monthly cover.

Read →

When to replace your boiler

7 signs repair isn't worth it anymore.

Read →