Sime Ecomfort System 25 HE Fault codes & diagnostics

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

System Natural Gas 2003-2012 Discontinued
GC Number 41-283-04
Download the Sime Ecomfort System 25 HE 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 your heating system, which means it has stopped heating your home or water to prevent damage.

High Engineer only £120-250

Parts commonly replaced

  • Central heating pump
  • Flow switch
  • System filter

Related codes

Full explanation for Flashing orange LED