Er02+RESET High

Biasi Er02+RESET Fault Code

Also written as ER02RESET — same fault.

The Biasi Er02+RESET fault code means: your boiler has shut down because it has detected an internal temperature that is too high, often caused by a blockage or a pump failure.. It appears on 1 Biasi model 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 lockout
Typical repair cost £100-£280 (including labour)

DIY fix possible

Press and hold the 'RESET' button for a few seconds to see if the boiler restarts.Check that all radiator valves are fully open to allow water to flow.Ensure your boiler pressure is between 1.0 and 1.5 bar on the pressure gauge.

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Biasi models that show the Er02+RESET fault code

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

Source

Biasi Er02+RESET 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 27 April 2026