BoilerFaultCodesGlow-worm Micron 100ff 120ff Fault Codes
Regular Natural Gas 30-35 kW 2000-2005 Discontinued
GC Numbers: 41-313-2941-313-30
Replaced by: Flexicom hy
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 Neon 2 NOT lit Neon 3 NOT lit
Your boiler is not receiving power, which means it cannot turn on to provide heating or hot water.
May be DIY safe · £90-280
Your boiler has stopped running because it has either detected that it is getting too hot or the water pressure in the system has dropped too low.
May be DIY safe · £90-280
Your boiler has stopped working because it cannot confirm that the internal fan is safely clearing waste gases out of the flue.
Gas Safe engineer required · £120-280
All 4 fault codes
Glow-worm Micron 100ff 120ff 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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