BoilerFaultCodesBiasi E08 Fault Code
The Biasi E08 fault code means: your boiler's outside temperature sensor is sending an incorrect signal or has lost connection, meaning the system may not know how hard it needs to work to heat your home.. It appears on 12 Biasi models in our database.
Technical description: External temperature probe fault (if connected)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Biasi models that show the E08 fault code
Click a model for the full fault code list and model-specific repair notes.
- Activa Repair: £90-160
- Advance 25C Repair: £90-160
- Antares Combi Repair: £120-350
- Antares System Repair: £90-160
- Basica Combi Repair: £120-190
- Basica System 2022 Repair: £120-£280
- Dina Repair: £120-200
- Inovia 2020 Repair: £90-160
- Inovia 2020 Repair: £90-160
- Rinnova Adaptive Combi Repair: £90-160
- Riva Advance M96.24SM Repair: £120-250
- Riva Plus M96.24SM Repair: £100-£190
Source
Biasi E08 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