Low
d.7 on Vaillant ecoMAX 824E

This code indicates that the boiler is simply reporting the current setting of its hot water 'keep-warm' function, rather than indicating 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

Warmstart temperature setting (ecoMAX 800)

From this model's manual
Verified against the Vaillant Ecomax 613 installation & service manual, page 47.
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

Locate the 'eco' or 'warmstart' button on the boiler control panelPress the button to toggle the function on or off according to your preferenceCheck that the display returns to showing the water temperature

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