High
E03 on Ferroli Modena F

Your boiler has stopped working because it cannot safely confirm that the fan is moving air and exhaust gases correctly through the system.

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

Air pressure switch failure (contacts not closing or opening correctly)

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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