Medium
2 02 on Ariston Clas HE 24

Your boiler is having trouble reading the temperature of your hot water storage tank, which means it cannot accurately heat your water.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description

Bottom storage temperature probe open / short circuit

Engineer required

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

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