B
Biasi Fault Codes
Select a fault code to see its meaning, common causes and how to fix it.
Advance & Riva Plus (ER codes)
- ER01 The ER01 code appears when your Biasi boiler has attempted to ignite and failed, triggering an automatic safety… Read more →
- ER02 The ER02 code appears on older Biasi boilers — such as the Riva Plus and Garda — when the internal safety thermostat… Read more →
- ER03 The ER03 code is Biasi's general safety lockout signal. Rather than pointing to one specific component, it tells you… Read more →
- ER04 The ER04 fault code on a Biasi boiler indicates a problem within the primary circuit — most commonly insufficient water… Read more →
- ER05 The ER05 code indicates that your Biasi boiler has detected a problem with the fan and has locked itself out as a… Read more →
- ER06 The ER06 fault code on a Biasi boiler points to a problem with the central heating (CH) NTC temperature probe — the… Read more →
- ER07 The ER07 code appears on Biasi boilers when the control board detects a problem with the domestic hot water (DHW)… Read more →
- ER08 The ER08 code means your Biasi boiler has detected a problem with the fan or flue system and has shut itself down as a… Read more →
- ER09 The ER09 code appears when your Biasi boiler detects an abnormal or out-of-range signal from the flue temperature probe… Read more →
- ER10 The ER10 code means your Biasi boiler has locked itself out after the flue temperature sensor — known as the flue NTC… Read more →
- ER12 The ER12 (also displayed as E12 on newer Biasi models such as the Inovia and Advance Plus) tells you that the boiler's… Read more →
- ER13 The ER13 code on a Biasi boiler signals that the boiler's PCB has detected an abnormal temperature differential between… Read more →
- ER14 The ER14 fault code on a Biasi boiler signals that the control board has detected either a failure in water circulation… Read more →
- ER19 The ER19 code (sometimes shown as ER + 19 on the boiler display) indicates that the boiler's control board is not… Read more →
- ER25 The ER25 code appears on Biasi boilers when the control board cannot confirm a stable flame during or after the… Read more →
- ER69 The ER69 code appears on Biasi boilers when the control system detects an electrical or wiring fault serious enough to… Read more →
Inovia (E codes)
- E01 The Biasi E01 (also displayed as ER 01 on older models such as the Riva Plus and Garda, or E133 on newer Inovia and… Read more →
- E02 The E02 (sometimes displayed as ER 02) fault code means the boiler has gone into a hard lockout because its safety… Read more →
- E03 The E03 (sometimes displayed as ER03) fault code on a Biasi boiler signals a generic lockout. Unlike more targeted… Read more →
- E04 The Biasi E04 fault (sometimes shown on the display as ER 04) signals that the boiler's primary circuit has encountered… Read more →
- E05 The E05 (also displayed as ER05 on some Biasi models) fault code indicates that the boiler has locked out due to a… Read more →
- E06 The E06 (sometimes displayed as ER 06) fault code on Biasi boilers indicates that the central heating flow temperature… Read more →
- E07 The E07 (also displayed as ER07 on some Biasi models) fault code indicates that the boiler's PCB has detected a problem… Read more →
- E08 The Biasi E08 (also displayed as ER 08) fault code indicates that the boiler's external NTC (Negative Temperature… Read more →
- E09 The Biasi E09 (also displayed as ER 09 on some models) fault code indicates that the boiler's control board has… Read more →
- E10 The E10 (also displayed as ER 10) fault code means your Biasi boiler has shut itself down — locked out — because the… Read more →
- E12 The E12 code appears on Biasi boilers when the control board cannot obtain a valid signal from the central heating… Read more →
- E13 The Biasi E13 fault code — also displayed as ER 13 on older Biasi models such as the Riva Plus and Garda, and as E13 on… Read more →
- E14 The Biasi E14 (sometimes shown as ER 14 on the display) is a blocking lockout fault that fires when the boiler detects… Read more →
- E19 The E19 code appears on newer-generation Biasi boilers, including the Rinnova and Rinnova Adaptive ranges. It signals… Read more →
- E20 The E20 fault code appears on certain boilers — most commonly Baxi models — to indicate that the primary NTC thermistor… Read more →
- E21 The E21 fault code on a Biasi boiler indicates an EVG lockout caused by a valve control relay failure. In plain terms,… Read more →
- E22 E22 is a safety lockout triggered when the Biasi control board detects a flame signal still present after it has sent… Read more →
- E23 The E23 code on a Biasi boiler indicates that the PCB (printed circuit board) is attempting to communicate with the gas… Read more →
- E24 The E24 code on a Biasi boiler has two distinct meanings depending on which model range you own. On newer Biasi models… Read more →
- E25 The E25 code appears on Biasi boilers — including the Binova and Rinnova ranges — when the boiler detects an… Read more →
- E69 The E69 (sometimes displayed as ER 69) fault code on Biasi boilers signals one of two closely related problems: either… Read more →
- E99 The E99 fault code on Biasi boilers indicates that the PCB (printed circuit board) — the electronic control unit that… Read more →
Latest Advance & Inovia (E1xx codes)
- E110 The E110 code appears on Biasi boilers — including the Inovia and Advance Plus ranges — when the built-in safety… Read more →
- E118 The E118 fault code appears on newer Biasi boiler models — including the Inovia and Advance Plus — and signals that the… Read more →
- E133 The E133 code (sometimes shown alongside a red lockout light as ER01 on older Biasi models) means your boiler made… Read more →
- E154 The E154 fault code (sometimes also displayed as A04 on certain Biasi models) indicates that the boiler's control board… Read more →
- E164 The E164 fault code on Biasi boilers — sometimes shown as A07 on certain models — indicates a problem with the domestic… Read more →