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Biasi Fault Codes

Select a fault code to see its meaning, common causes and how to fix it.

• 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 →
• ER04 The ER04 fault code on a Biasi boiler indicates a problem within the primary circuit — most commonly insufficient water… 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 →