BoilerFaultCodesBaxi é0 Fault Code
Also written as 0 — same fault.
The Baxi é0 fault code indicates a fault on your boiler. It appears on 2 Baxi models in our database.
Technical description: Flow or return sensor fault. Short circuit in the flow, return or boiler temperature sensor. Defective or not (properly) connected flow, return or boiler temperature sensor.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Baxi models that show the é0 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Baxi é0 fault code information on this page is sourced and cross-checked against the official Baxi service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026