Emergency
E03 on Ferroli Xignal

Your boiler is struggling to clear exhaust gases safely, so it has shut down to prevent any risk of fumes entering your home.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

Technical description

Air pressure switch intervention (flue/fan fault)

Engineer required

This is a emergency 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

F37View →

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