Low
d.07 on Vaillant ecoFIT Pure 835

Your boiler is displaying the current target temperature setting for your hot water storage, rather than an error or breakdown code.

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

Set target temperature for the domestic hot water cylinder

DIY fix possible

Press the 'Menu' or 'Back' button to return to the main displayAdjust the hot water temperature dial if the displayed value is not what you desireIdentify if the boiler is stuck in a setting menu and restart the power if the screen does not clear

Find a Gas Safe engineer
Search the official register →

Related fault codes

d.00View →d.01View →d.40View →

Related guides you might find useful

No hot water but heating works

Almost always a stuck diverter valve on combis.

Read →

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 →