Low
d.62 on Vaillant ecoFIT pure

Your boiler is currently running at a lower temperature because it is in a scheduled energy-saving mode, typically used during the night.

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 thermostat or programmer settingsAdjust the 'night' or 'set-back' temperature if the house is too coldVerify the boiler clock is showing the correct time

Find a Gas Safe engineer
Search the official register →

Related fault codes

d.65View →

Related guides you might find useful

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 →

New boiler cost 2026

Realistic UK prices for a swap.

Read →