Baxi 830 Combi 2 Fault codes & diagnostics

1 fault code with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

Combi Natural Gas 2023-present
GC Number 47-077-64
Download the Baxi 830 Combi 2 manualThe official installation and service manual (PDF), the document these fault codes were read from. PDF

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Fault codes

All 1 documented codes

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254

Your boiler is displaying a communication error because it is having trouble talking to your room thermostat or control unit.

Medium Engineer only £90-180

Parts commonly replaced

  • Room thermostat
  • PCB
  • Wiring harness

Related codes

Full explanation for 254
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