Medium
E08 on Ariston Genus 24 MFFI

Your boiler has lost the connection to the temperature sensor responsible for your underfloor heating, so it has stopped these heaters from working to prevent them from getting too hot.

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

Under floor heating temperature probe in open circuit

Engineer required

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

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