BoilerFaultCodes Green light
Your boiler is working correctly and is simply indicating that the internal burner is lit and ready to provide heating or hot water.
Glow-worm Glow-worm Fuelsaver 56 3E Fault codes & diagnostics
2 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Regular Natural Gas 16.4 kW 1994-1999 Discontinued
GC Number 41-315-77
Replaced by: Flexicom r
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 2 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.
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.
What to check first
- Check if other gas appliances (like a cooker) are working to confirm gas supply
- Locate the reset button (usually a small button or dial on the front panel)
- 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