Baxi 624 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 47-077-55
Download the Baxi 624 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 code because a connected room thermostat or control unit is experiencing a temporary signal glitch or wiring interruption.

Medium Engineer only £90-180

Parts commonly replaced

  • Room Thermostat
  • Receiver
  • PCB

Related codes

Full explanation for 254
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