Medium
F9 on Ferroli Domi Compact

Your boiler has lost the ability to detect when you turn on the hot tap, meaning your hot water will currently not fire up when needed.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

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

Tap water sensor fault. Possible cause: Sensor damaged; Wiring shorted; Wiring broken

Engineer required

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

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Related fault codes

F05View →F37View →

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