Low
F39 on Ferroli iBoiler 24

Your boiler has lost connection with its outdoor temperature sensor, causing it to lose track of the weather outside.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description

Optional external probe error

Engineer required

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

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Related fault codes

F34View →F35View →

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