Baxi Genesis 80 Fault codes & diagnostics

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

Combi Natural Gas 24 kW 1995-2000 Discontinued
GC Numbers 47-077-0147-077-02

Replaced by: Baxi Solo 2 / Baxi Combi 80e

Download the Baxi Genesis 80 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
47-077-01 Genesis 80 1995–2000
47-077-02 Genesis 96 1996–1998
Fault codes

All 2 documented codes

Tap any card for details

F2

Your boiler has stopped working because an internal safety fuse has blown, cutting off the electrical supply to critical components.

High Engineer only £120-200

Parts commonly replaced

  • Internal PCB fuse
  • Main Control PCB
  • Wiring harness

Related codes

Full explanation for F2
Red Light

Your boiler has stopped working because it cannot light or maintain a flame, meaning you currently have no heating or hot water.

High Engineer only £120-250

Parts commonly replaced

  • Ignition electrode
  • Gas valve
  • Flame sensing probe
Full explanation for Red Light
Status & diagnostic codes

2 operating states & engineer diagnostics

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

Green Light Status Your boiler is receiving electrical power and is ready to operate normally. Orange Light Status Your boiler is receiving power and should be operating normally, as this light typically indicates the appliance is switched on.