Verified boiler fault code
Biasi E01 Fault Code (BASICA COND)
Safety lockout due to failed ignition.
Safety disclaimer
Fault code summary
- Manufacturer
- Biasi
- Fault code
- E01
- Fault type
- Ignition, Flame failure, Safety lockout
- Severity
- high
- Reset
- The manual provides a Reset key and says the user may restart codes marked for direct user restart; follow the Biasi instructions and do not repeatedly reset a recurring lockout.
- Applicable models
- BASICA COND 24C, BASICA COND 28C, BASICA COND 32C
Quick answer
Safety lockout due to failed ignition.
What does this fault code mean?
Safety lockout due to failed ignition.
Common causes
- Failed ignition
Symptoms
- E01 shown on the LCD
- Safety lockout
What can the homeowner safely check?
- Record the displayed code and check only normal power and controls; do not work on gas or ignition components.
Boiler reset information
The manual provides a Reset key and says the user may restart codes marked for direct user restart; follow the Biasi instructions and do not repeatedly reset a recurring lockout.
When should I call an engineer?
Contact a suitably qualified heating engineer when the fault persists, the boiler locks out, or the manufacturer instructions do not resolve it. For gas appliance work in the UK, use a Gas Safe registered engineer.
Engineer diagnosis
- A Gas Safe engineer should investigate ignition, flame detection, gas supply and associated controls.
Applicable boiler models
Related fault codes
- E02 — BASICA COND
Lockout due to the safety thermostat.
Read fault code - E03 — BASICA COND
EEPROM error.
Read fault code - E04 — BASICA COND
Pump circulation failure or insufficient system pressure.
Read fault code - E05 — BASICA COND
Fan-control anomaly.
Read fault code - E06 — BASICA COND
Heating NTC probe failure.
Read fault code - E07 — BASICA COND
DHW NTC probe failure.
Read fault code - E08 — BASICA COND
External NTC probe failure.
Read fault code - E09 — BASICA COND
Flue-gas NTC probe interruption.
Read fault code
Manufacturer documentation
Biasi BASICA COND user manual and installation instructionsSIGNAL DISPLAYED BY THE LCD: | E01+ | Safety lockout due to failed ignition |
Last verified
2026-09-12
Frequently asked questions
What does Biasi E01 mean?
Safety lockout due to failed ignition.
Can I reset a Biasi E01 fault?
The manual provides a Reset key and says the user may restart codes marked for direct user restart; follow the Biasi instructions and do not repeatedly reset a recurring lockout.