Low
d.07 on Vaillant Home System

Your boiler is currently displaying the target temperature setting for your hot water storage tank rather than a fault.

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

Set target temperature for the domestic hot water cylinder: Current value

From this model's manual
Verified against the Vaillant Home System installation & service manual.
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

Press the 'Back' or 'Menu' button to exit the diagnostic menuTurn the boiler off and back on at the main isolation switch to reset the displayConsult the manual to adjust the cylinder temperature if the water is too hot or cold

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Related fault codes

d.00View →d.04View →

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