BoilerFaultCodesViessmann EA Fault Code
The Viessmann EA fault code means: your boiler has failed to ignite or stay lit because it cannot properly detect the burner flame, so it has safely shut itself down to prevent any risk.. It appears on 2 Viessmann models in our database.
Technical description: Burner in a fault state / Ionisation current outside the permissible range during calibration (deviation from previous level too great)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Viessmann models that show the EA fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Viessmann EA fault code information on this page is sourced and cross-checked against the official Viessmann service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026