BoilerFaultCodes.com

Glow-worm Ultimate 30ff Fault Codes

Regular Natural Gas 8.8-30.7 kW 1994-2005 Discontinued
GC Number: 41-313-28

Replaced by: Flexicom h

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

F1
Your boiler has lost power to its main control board because an internal fuse has blown, meaning the unit cannot function at all.
Gas Safe engineer required · £120-280
F2
Your boiler has lost power internally because a small fuse has blown, meaning the system cannot run its basic safety checks or start up.
Gas Safe engineer required · £120-£280
Fan Hunt
Your boiler is struggling to start up properly because the main internal computer is failing to control the fan correctly.
Gas Safe engineer required · £250-£450

All 15 fault codes

Code Severity Plain English
F1 High Your boiler has lost power to its main control board because an internal fuse has blown, meaning the unit cannot function at all.
F2 High Your boiler has lost power internally because a small fuse has blown, meaning the system cannot run its basic safety checks or start up.
Fan Hunt High Your boiler is struggling to start up properly because the main internal computer is failing to control the fan correctly.
Neon 1 lit (No) High Your boiler has lost electrical power, which is usually caused by an issue with the mains supply or a blown internal fuse.
Neon 1 NOT lit High Your boiler has lost power completely, which means it isn't receiving electricity or an internal fuse has blown.
Neon 2 lit (No) High Your boiler has become too hot and has automatically shut down for safety purposes.
Neon 2 NOT lit High Your boiler has switched itself off because it has reached an unsafe temperature, likely due to a circulation issue or a component failure.
Neon 3 lit (No) High Your boiler has stopped working because it cannot safely clear away waste gases, preventing it from firing up.
Neon 3 NOT lit High Your boiler has detected that the internal fan is not moving air correctly, so it has stopped the ignition process for your safety.
Neon 4 lit (No) High Your boiler is failing to light the gas flame or cannot detect that the flame has started, so it has shut down for safety.
Neon 4 NOT lit High Your boiler is failing to light the gas or keep the flame burning, which means your heating and hot water will not work.
Neon1 High Your boiler is not receiving electrical power correctly or there is a wiring issue preventing it from starting.
Neon2 High Your boiler has shut down because it has detected it is getting too hot, or there is a loose internal connection.
Neon3 High Your boiler has detected an internal sensor or pressure issue and has stopped working to protect itself.
Neon4 High Your boiler has detected an internal electrical or gas valve issue that is preventing the pilot light from staying lit, meaning it cannot heat your water or radiators.

Glow-worm Ultimate 30ff 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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