Sime Ecomfort HE Combi Fault codes & diagnostics

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

Combi Natural Gas 2003-2012 Discontinued
GC Numbers 47-283-0447-283-0647-719-25
Download the Sime Ecomfort HE Combi manualThe official installation and service manual (PDF), the document these fault codes were read from. PDF

This boiler uses LED flash patterns

Count the flashes in one repeating group before the pause. That number is your fault code. Do not reset until you have noted it. How to read fault codes →

Fault codes

All 1 documented codes

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Flashing orange LED

Your boiler is struggling to move water through its system, which means it has safely shut itself down to prevent overheating.

High Engineer only £120-250

Parts commonly replaced

  • Circulation pump
  • System pressure sensor
  • Flow switch

Related codes

Full explanation for Flashing orange LED