High
E26 on Ariston Egis 24 MFFI

Your boiler has detected an electrical fault with the sensor that monitors the temperature of your hot water tank, meaning it cannot heat water safely.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Tank sensor short circuit

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

E25View →E27View →

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