High
E.01 – .11 on Baxi Suprima 80

Your boiler's fan unit is struggling to move air correctly, which could be caused by strong winds outside or a mechanical failure within 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

Incorrect fan speed – external draught over the boiler or defective gas/air unit.

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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