BoilerFaultCodes Red light
Pilot light is not operating correctly, or the flue blockage safety device has been activated
Glow-worm 54/4 BBU Fault codes & diagnostics
1 fault code with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Gas 2001 onwards Discontinued
GC Number 44-047-05
Download the Glow-worm 54/4 BBU manual
PDF
Versions & GC numbers
The fault code is already on your display
Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →
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 |
|---|---|---|
| 44-047-05 | 54/4 BBU | 2001–2003 |
Appliance names and production years are taken from the UK Product Characteristics Database (the SAP/SEDBUK register). Where a GC number is also printed in this model's own manufacturer manual, both sources were checked to agree.
Fault codes
All 1 documented codes
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