Potterton Kingfisher 2 Fault codes & diagnostics

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

Regular Natural Gas 17.6-29.3 kW 2001-2007 Discontinued
GC Numbers 41-607-1741-607-1841-607-1941-607-2041-607-2141-590-3141-590-3241-590-3441-590-2441-590-2841-590-29

Replaced by: Potterton Kingfisher CF

Download the Potterton Kingfisher 2 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
41-590-31 Kingfisher MF CFL80 2001–2007
41-590-32 Kingfisher MF CFL90 2001–2005
41-590-34 Kingfisher MF CFL100 2001–2005
41-590-24 Kingfisher Mf CFL 40 2002–2006
41-590-28 Kingfisher MF CFL50 2001–2007
41-590-29 Kingfisher MF CFL60 2001–2006
Fault codes

All 2 documented codes

Tap any card for details

A. (1)

Your boiler is failing to ignite because it is not receiving the gas it needs to start the flame.

High Engineer only £120-250

Parts commonly replaced

  • Gas valve
  • Thermocouple
  • Pilot assembly
Full explanation for A. (1)
A. (3)

Your boiler is unable to start up because the small flame that acts as a trigger is being blocked from lighting, which means the boiler cannot heat your home or water.

High Engineer only £120-220

Parts commonly replaced

  • Pilot injector
  • Pilot burner assembly
  • Thermocouple
Full explanation for A. (3)