Worcester Bosch Danesmoor Fault codes & diagnostics

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

Regular Oil 12-32 kW 1970-present
Download the Worcester Bosch Danesmoor manualThe official installation and service manual (PDF), the document these fault codes were read from. PDF

The fault code is already on your display

Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Fault codes

All 1 documented codes

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RED 0.5s ON

Your boiler has failed to ignite the burner and has safely shut itself down to prevent a fuel build-up.

High Engineer only £150-300

Parts commonly replaced

  • Oil nozzle
  • Photocell
  • Ignition transformer
  • Control box

Related codes

Full explanation for RED 0.5s ON
Status & diagnostic codes

1 operating states & engineer diagnostics

Not faults — these are normal operating states. Tap to expand.

Red 0.2s ON Status Your boiler's reset button is either stuck or sending a constant signal, which is preventing the system from restarting correctly.
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