BoilerFaultCodesBiasi 30c Fault Code
Also written as 30C — same fault.
The Biasi 30c fault code means: your boiler has likely detected a problem with the temperature sensor or its wiring, meaning it cannot accurately gauge how hot the water is.. It appears on 10 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 30c fault code
Click a model for the full fault code list and model-specific repair notes.
- M90E 24S Repair: £90-250
- M90E 28S Repair: £120-£350
- M96E Repair: £120-£350
- Parva 24S Repair: £90-160
- Parva 28S Repair: £90-180
- Riva Advance M96.24SM Repair: £120-280
- Riva Advance M96.28SM Repair: £120-280
- Riva Compact 24S Repair: £120-280
- Riva Compact 28S Repair: £100-220
- Riva Plus M96.24SM Repair: £120-£350
Source
Biasi 30c 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