Low
d.36 on Vaillant Home System

Your boiler is simply displaying the current speed of your hot water flow as an informational check rather than reporting a breakdown.

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

Value for the hot water flow: Current value in l/min

DIY fix possible

Press the 'Menu' or 'Back' button to exit the diagnostic modeTurn off any running hot water taps to see if the value changes to zeroRestart the boiler if the display remains stuck on this information screen

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Related fault codes

d.35View →d.40View →S.14View →

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