Potterton Flamingo RS40 RS50 Fault codes & diagnostics

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

Regular Natural Gas 11.7-14.7 kW 1970s-1980s Discontinued

Replaced by: Suprima

Download the Potterton Flamingo RS40 RS50 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 →

Fault codes

All 1 documented codes

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B(5)

Your boiler's pilot light has gone out and will not stay lit, meaning the system cannot fire up to provide heating or hot water.

High Engineer only £90-180

Parts commonly replaced

  • Thermocouple
  • Gas Valve Power Unit
  • Magnetic Latch
Full explanation for B(5)