BoilerFaultCodes.com

Glow-worm Fuelsaver Complheat 40 55 Fault Codes

Regular Natural Gas 11.7-16.1 kW 1994-1996 Discontinued
GC Number: 41-313-25

The fault code is already on your display

Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Most common fault codes

Neon 1 NOT lit
Your boiler is not receiving electrical power or has shut down because there is not enough water pressure in the system.
May be DIY safe · £90-250
Neon 2 NOT lit
Your boiler has shut itself down because it became too hot, likely due to a circulation problem or a component failure.
May be DIY safe · £100-280
Neon 3 NOT lit
Your boiler has stopped working because it cannot confirm that the internal fan is safely clearing waste gases from the system.
Gas Safe engineer required · £120-£280

All 10 fault codes

Code Severity Plain English
Neon 1 NOT lit High Your boiler is not receiving electrical power or has shut down because there is not enough water pressure in the system.
Neon 2 NOT lit High Your boiler has shut itself down because it became too hot, likely due to a circulation problem or a component failure.
Neon 3 NOT lit High Your boiler has stopped working because it cannot confirm that the internal fan is safely clearing waste gases from the system.
Neon 4 NOT lit High Your boiler is failing to light its pilot light or detect a steady flame, meaning it cannot start the heating process.
Neon1 High Your boiler has lost power or has insufficient water pressure to operate safely, meaning it cannot provide heating or hot water until reset.
Neon2 High Your boiler has switched itself off because it has become too hot internally, likely due to a circulation problem or a faulty safety sensor.
Neon3 High Your boiler has detected an issue with the ventilation system, meaning it cannot safely clear waste gases and has shut down as a precaution.
Neon4 High Your boiler is attempting to start but cannot light or maintain the flame needed to provide heating and hot water.
RED NEON High Your boiler has stopped working because the water pressure in the central heating system is too low.
Red neon on fascia High Your boiler has stopped working because the water pressure in the central heating system is too low.

Glow-worm Fuelsaver Complheat 40 55 is discontinued — time for a new one?

Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.

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