10 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
The fault code is already on your display
Note it down before pressing reset — resetting clears the code immediately. 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 |
|---|---|---|
| 47-077-04 | Platinum 24 Combi ErP | 2015–present |
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.
Tap any card for details
Your boiler has lost track of how hot the water inside the heating system is because a temperature sensor has failed.
Your boiler is struggling to clear exhaust gases safely and has turned itself off to prevent a potential hazard.
Your boiler is struggling to detect the temperature of the water it is trying to heat, so it has shut down to prevent overheating.
Your boiler has automatically shut down because it detected that the internal water temperature became dangerously high.
Your boiler has temporarily stopped working because the water pressure inside the system has dropped too low.
Your boiler has detected that water is not flowing properly around your heating system, so it has safely shut down to prevent overheating.
Your boiler has temporarily stopped working because it has detected that the exhaust gases coming from the flue are too hot.
Your boiler has temporarily stopped working because it cannot detect a steady flame, which usually points to an issue with your gas supply or the way the boiler is igniting.
Your boiler has stopped working because it cannot detect that the internal fan, which safely removes combustion gases, is operating properly.
Your boiler is struggling to get water moving around the system correctly before it attempts to fire up.
Monthly cover means no unexpected bills when your boiler breaks down.
Affiliate links. We may earn a commission at no extra cost to you.
BoilerFaultCodes