V

Viessmann Fault Codes

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

• EA The EA fault code indicates that your Viessmann boiler has attempted to light its burner on multiple occasions and… Read more →
• EB The EB fault code on a Viessmann boiler indicates that the boiler failed to detect a valid flame signal during its… Read more →
• EC The EC fault code appears on older Viessmann boiler models and signals a circulation-related burner lockout. In plain… Read more →
• EE The EE fault code on Viessmann boilers has two related interpretations that can overlap depending on your specific… Read more →
• F0 The F0 fault code on most Viessmann Vitodens boilers (including the popular 100-W and 050-W) indicates that the boiler… Read more →
• F2 The F2 code on a Viessmann boiler signals a burner lockout — the boiler's built-in safety system has detected a problem… Read more →