11 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Replaced by: Baxi Duo-tec Combi HE
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 |
|---|---|---|
| 47-075-18 | System 35/60 | 2001–2006 |
Tap any card for details
Your boiler has encountered a general electrical or system error that requires a manual reset to try and clear the fault.
Your boiler is failing to detect that the internal fan is blowing correctly, which prevents it from firing up safely.
Your boiler has stopped working because it cannot light its internal flame or because the pipe that drains away waste water is blocked.
Your boiler has detected that it is dangerously hot and has automatically shut down to prevent damage or a fire risk.
Your boiler is struggling to clear exhaust gases safely, so it has shut down to prevent any risks.
Your boiler has detected that water is failing to circulate properly, most likely because the pressure in your heating system has dropped too low.
Your boiler is struggling to detect the temperature of the water it is trying to heat, which means you likely have no hot water available.
Your boiler has stopped working because it is unable to accurately measure the temperature of the water being pushed to your radiators.
Your boiler is struggling to detect when you turn on your hot taps, which means it cannot tell when to start heating your water.
Your boiler has detected an issue with the internal ventilation system that prevents it from starting safely, meaning you currently have no heating or hot water.
Your boiler has stopped working because it couldn't safely ignite its internal flame, which means your heating and hot water have turned off as a safety precaution.
Not faults — these are normal operating states. Tap to expand.
BoilerFaultCodes