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 10 Biasi models in our database.
Technical description: D.h.w. inlet temperature probe NTC fault (for models with inlet probe)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Biasi models that show the E08 fault code
Click a model for the full fault code list and model-specific repair notes.
- Activ A Repair: £90-160
- Activ A Repair: £120-200
- Advance Plus 16S 25S 30S Repair: £120-200
- Advance Plus 16S 25S 30S Repair: £120-200
- 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
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.
- Biasi Activ A manual (PDF)
- Biasi Advance Plus 16S 25S 30S manual (PDF)
- Biasi Basica Combi manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026