BoilerFaultCodesBiasi ER 03 + Reset Fault Code
Also written as ER03RESET — same fault.
The Biasi ER 03 + Reset fault code means: your boiler has detected a problem with how it is getting rid of exhaust gases or taking in fresh air, causing it to shut down for safety.. It appears on 11 Biasi models in our database.
Technical description: N/A
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Biasi models that show the ER 03 + Reset fault code
Click a model for the full fault code list and model-specific repair notes.
- Advance 25C Repair: £100-350
- M90E 24S Repair: £100-280
- M90E 28S Repair: £120-£280
- M96E Repair: £100-£250
- Parva 24S Repair: £100-280
- Parva 28S Repair: £100-280
- Riva Advance M96.24SM Repair: £100-280
- Riva Advance M96.28SM Repair: £120-280
- Riva Compact 24S Repair: £100-£250
- Riva Compact 28S Repair: £100-£280
- Riva Plus M96.24SM Repair: £100-£250
Source
Biasi ER 03 + 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