Low
d.04 on Vaillant aquaPLUS

Your boiler is currently showing you the live temperature of the water inside your storage tank rather than an error 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

Actual tank temperature

DIY fix possible

Press the 'i' button to exit the diagnostic modeWait for the display to revert to the standard pressure or temperature viewIf the screen is stuck, briefly turn the boiler off and back on at the fused spur switch

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Related fault codes

d.00View →d.01View →d.02View →

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