North West Gas Compliance

Biasi Fault Codes

Searchable list

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Boilers covered:

  • Riva Compact and Riva Compact HE
  • Riva Plus and Riva Plus HE
  • Riva Advance HE
  • Garda and Garda HE
  • Parva and Parva HE
  • Gaia
  • Prisma
  • Older M90-series models
  • Biasi Antares
  • Biasi Basica
  • Biasi Dina
  • Biasi Rinnova Adaptive
  • Biasi Rinnova
  • Biasi Inovia
  • Biasi Activ A
  • Biasi Advance
  • Biasi Advance Plus
Note: Low-pressure codes (ER 04) may be user-fixable. Most others require a Gas Safe engineer.

Modern Codes (ER / E series)

Error codePossible faultIf ticked try the troubleshooter
ER 01 / E01Lack of burner ignition / safety lockout✓
ER 02 / E02Safety thermostat intervention lockout✕
ER 03 / E03General lockout✕
ER 04 / E04Faulty primary circuit (no water or absence of flow)✕
ER 05 / E05Faulty fan control system✕
ER 06 / E06Faulty CH temperature probe NTC✕
ER 07 / E07Faulty DHW temperature probe NTC✕
ER 08 / E08Faulty external temperature probe NTC✕
ER 09 / E09Faulty flue temperature probe NTC✕
ER 10 / E10Flue probe intervention lockout✕
ER 12 / E12Faulty CH temperature probe NTC (return)✕
ER 13 / E13DT delivery return > 40K✕
ER 14 / E14Faulty pump or primary temperature above 105°C✕
ER 15 / E15None or too low water flow✓
ER 16 / E16Possible exchange of NTC probes or pump wrongly mounted✕
ER 17 / E17Faulty CH temperature probe NTC✕
ER 18 / E18Faulty primary circuit (no water or absence of flow)✕
ER 19 / E19DHW inlet probe failure✕
ER 25 / E25Flame detection fault✓
ER 69Wiring fault lockout✕
E11Parasite flame✕
E20–E26Gas valve / combustion faults (newer models)✕
E40Incorrect mains frequency✕
E42Buttons fault✕
E50OT communication fault✕
E62Calibration request✕
E65Combustion control fault✕
LiPrimary circuit temp limit during DHW✕
FLSystem pressure too high / filling request✓