High
ER 8 on Ferroli Xignal

Your boiler is currently unable to correctly measure the temperature of the water it is heating, so it has stopped providing hot water to keep the system safe.

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

FAULT S.H.W. SENSOR - Defective hot water temperature sensor

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

ER 7View →ER 9View →

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