BoilerFaultCodesBiasi Er 01 Fault Code
Also written as ER01 — same fault.
The Biasi Er 01 fault code means: your boiler has failed to light the flame and has turned itself off for safety reasons, meaning you currently have no heating or hot water.. It appears on 15 Biasi models in our database.
Technical description: Lack of burner ignition on safety lockout
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A cover plan would handle faults like Er 01: no call-out fees, no surprise bills.
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Biasi models that show the Er 01 fault code
Click a model for the full fault code list and model-specific repair notes.
- Activ A Repair: £100-280
- Advance 25C Repair: £100-250
- Advance 25S Repair: £100-250
- Advance 30C Repair: £100-250
- Advance 30S Repair: £100-250
- Advance 35C Repair: £100-250
- Advance Plus Repair: £120-£250
- Advance Plus 16S Repair: £120-250
- Advance Plus 16S 25S 30S Repair: £120-250
- Advance Plus 25C Repair: £100-250
- Advance Plus 30C Repair: £100-250
- Advance Plus 30S Repair: £120-250
- Advance Plus 30S ErP Repair: £100-250
- Advance Plus 30S ErP Repair: £100-280
- Advance Plus 35C Repair: £100-250
Source
Biasi Er 01 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 31 August 2026