Glow-worm Glow-worm Fuelsaver 56 3E Fault codes & diagnostics

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

Regular Natural Gas 16.4 kW 1999-2003 Discontinued
GC Numbers 37-047-0837-047-0944-047-04

Replaced by: Flexicom r

Download the Glow-worm Glow-worm Fuelsaver 56 3E 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
44-047-04 56/3e BBU 1999–2003
Fault codes

All 1 documented codes

Tap any card for details

Red light

Your boiler has shut down for safety because it cannot maintain a steady pilot light or has detected a problem with how waste gases are being removed.

High DIY-safe £90-280

What to check first

  1. Check if other gas appliances (like a cooker) are working to confirm gas supply
  2. Locate the reset button (usually a small button or dial on the front panel)
  3. Press and hold the reset button for several seconds to try and reignite the pilot light

Parts commonly replaced

  • Thermocouple
  • Gas Valve
  • Flue Thermistor
  • Pilot Injector
Full explanation for Red light
Status & diagnostic codes

1 operating states & engineer diagnostics

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

Green light Status Your boiler is working correctly and is simply indicating that the internal burner is lit and ready to provide heating or hot water.