High
05E on Ravenheat 100

Your boiler has detected an issue where the fan is not spinning correctly or communicating with the system, preventing the boiler from starting for safety reasons.

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

Problem with fan, possibly no signal

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

04EView →21EView →

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