Baxi 824 System 2 Fault codes & diagnostics

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

System Natural Gas 2023-present
GC Number 41-884-09
Download the Baxi 824 System 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 has lost communication with its smart thermostat or controller, meaning it cannot properly receive instructions to heat your home.

Medium Engineer only £90-180

Parts commonly replaced

  • Room Thermostat
  • PCB
  • Wiring Centre

Related codes

Full explanation for 254
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