BoilerFaultCodesWarmworld Combi Fault codes & diagnostics
0 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Combi Natural Gas 1995 onwards Discontinued
GC Number 47-555-03
Download the Warmworld Combi manual
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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 |
|---|---|---|
| 47-555-03 | Warmworld Combi | 1995–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.
Status & diagnostic codes 7 operating states & engineer diagnostics
Not faults — these are normal operating states. Tap to expand.
7 operating states & engineer diagnostics
Not faults — these are normal operating states. Tap to expand.
931 Diagnostic Your boiler has detected that the water inside the system is becoming dangerously hot and has shut itself down to prevent damage or overheating. 1277 Diagnostic Your boiler has detected that the water inside the system has become dangerously overheated and has shut itself down to prevent damage. 1780 Diagnostic Your boiler has detected that the water inside the system has reached an excessively high temperature and is shutting down to prevent damage. 2526 Diagnostic Your boiler is currently monitoring a temperature reading of 60°C, which is a standard operating temperature for your hot water system. 3657 Diagnostic Your boiler has detected that the water temperature is too low for it to operate correctly. 5406 Diagnostic Your boiler is struggling to reach or maintain the correct water temperature, causing it to shut down for safety. 8176 Diagnostic Your boiler is currently reading an abnormally low temperature, indicating that the system is not firing up to heat your water or radiators.