9 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
This boiler uses LED flash patterns
Count the flashes in one repeating group before the pause. That number is your fault code. Do not reset until you have noted it. How to read fault codes →
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 |
|---|---|---|
| 41-333-91 | Halstead Buckingham 4 80BFF | 2002–2006 |
| 41-333-92 | Halstead Buckingham 4 100BFF | 2002–2006 |
| 41-333-93 | Halstead Buckingham 4 115BFF | 2002–2006 |
| 41-333-97 | Halstead Buckingham 4 80CFF | 2002–2006 |
| 41-333-98 | Halstead Buckingham 4 100CFF | 2002–2006 |
| 41-333-99 | Halstead Buckingham 4 115CFF | 2002–2006 |
Tap any card for details
Your boiler's computer is experiencing a temporary processing confusion that has caused it to stop working to protect the system.
Your boiler's internal computer is experiencing a critical error and cannot safely operate the system.
Your boiler has failed to light the flame, so it has safely shut itself down to prevent a gas build-up.
Your boiler is experiencing a general internal fault that is preventing it from operating correctly.
Your boiler has stopped working as a safety precaution and needs to be manually restarted to see if it can clear the internal error.
Your boiler has failed to light the flame and has turned itself off for safety.
Your boiler is failing to clear air from the system before starting, which is preventing it from firing up safely.
Your boiler has stopped working because it has detected an issue with the water temperature or the ignition process and needs to be reset.
Your boiler has stopped because it failed to light or stay lit, which means you currently have no heating or hot water.
Not faults — these are normal operating states. Tap to expand.
BoilerFaultCodes