High
F13 on Ferroli iBoiler 28

Your boiler has detected a problem with a temperature sensor that monitors the main heat exchanger, preventing it from heating your 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

Exchanger probe error – t-sensor damaged, short circuited, sensor damaged or wiring broken

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

F10View →F11View →F14View →

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