BoilerFaultCodesBiasi ER + 25 + Reset Fault Code
Also written as ER25RESET — same fault.
The Biasi ER + 25 + Reset fault code means: your boiler has likely detected a circulation or temperature sensing issue, meaning the water is either not moving correctly or the boiler thinks it is overheating.. It appears on 11 Biasi models in our database.
Technical description: N/A
DIY fix possible
Check that the boiler pressure is between 1.0 and 1.5 barEnsure all radiator valves and isolation valves under the boiler are fully openTry bleeding your radiators to remove any trapped airPress and hold the Reset button for 5 seconds
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Gas Safe Register →Biasi models that show the ER + 25 + Reset fault code
Click a model for the full fault code list and model-specific repair notes.
- Advance 25C Repair: £120-300
- M90E 24S Repair: £120-350
- M90E 28S Repair: £120-280
- M96E Repair: £120-£350
- Parva 24S Repair: £120-350
- Parva 28S Repair: £120-280
- Riva Advance M96.24SM Repair: £120-£350
- Riva Advance M96.28SM Repair: £120-350
- Riva Compact 24S Repair: £120-280
- Riva Compact 28S Repair: £80-220
- Riva Plus M96.24SM Repair: £120-300
Source
Biasi ER + 25 + 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