Worcester Bosch 24 RSF Fault codes & diagnostics

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

Combi Natural Gas 24 kW 2003 onwards Discontinued
GC Number 47-311-12

Replaced by: 240 Ri / 240 i

Download the Worcester Bosch 24 RSF manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. 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 →

Versions & GC numbers

Which version do you have?

The GC number on your boiler's data badge identifies the exact appliance and production years, as recorded in the UK Product Characteristics Database.

GC number Appliance (register name) Produced
47-311-12 RD 542i Combi 2003–present
Fault codes

All 1 documented codes

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360

Your boiler's computer brains are not communicating correctly because the internal memory chip doesn't match the main control board.

High Engineer only £180-£350

Parts commonly replaced

  • Heat Control Module (HCM)
  • Main PCB (Printed Circuit Board)

Related codes

Full explanation for 360
Status & diagnostic codes

3 operating states & engineer diagnostics

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

200 Status Your boiler is currently working correctly and is simply indicating that it is in central heating mode. F2 1.25AT Diagnostic Your boiler has stopped working because an internal safety fuse has blown, likely due to an electrical surge or a faulty component inside the unit. rE Status Your boiler is currently attempting to restart itself, likely after it detected an issue or you pressed the reset button.