Low
d.58 on Vaillant ecoFIT Pure 412

Your boiler is currently waiting for or receiving a signal that your solar thermal water heating system is topping up the temperature of your hot water cylinder.

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

Solar circuit reheating

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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