Low
2 05 on Ariston Clas One

Your boiler is having trouble reading the temperature of the water heated by your solar panels, likely due to a loose wire or a faulty sensor connection.

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

D.H.W. In sensor open / short circuit (solar)

Engineer required

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

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Related fault codes

2 07View →

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