E02 High

Biasi E02 Fault Code

The Biasi E02 fault code means: your boiler has shut down because it has detected it is getting too hot, likely due to a circulation issue or a sensor fault.. It appears on 9 Biasi models in our database.

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: Safety thermostat intervention (Overheating) / Maximum temperature probe
Typical repair cost £90-250 (including labour)

DIY fix possible

Ensure all radiator valves (TRVs) are fully open to allow water flowCheck that the boiler pressure is between 1.0 and 1.5 bar on the gaugePress the 'Reset' button on the front of the boiler control panel

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Biasi models that show the E02 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Biasi E02 fault code information on this page is sourced and cross-checked against the official Biasi service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026