BoilerFaultCodesBaxi 6 flashes red Fault Code
Also written as 6FLASHESRED — same fault.
The Baxi 6 flashes red fault code means: your boiler has stopped working because of a communication failure or an electrical connection issue between its internal or external components.. It appears on 4 Baxi models in our database.
Technical description: Miscellaneous: Bad connection or wiring fault internal or external to the boiler, Parameter error, Communication error
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 6 flashes red fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Baxi 6 flashes red fault code information on this page is sourced and cross-checked against the official Baxi service / installation manuals for each affected model.
- Baxi 613 Heat manual (PDF)
- Baxi 800 Heat (range) manual (PDF)
- Baxi EcoBlue Advance Heat manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026