Ideal Boxer C Fault Codes

Combi Natural Gas 24-28 kW 2000-2003 Discontinued

GC Numbers: 47-348-1847-348-19

Replaced by: Isar HE

The fault code is already on your display

Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Most common fault codes

Code	Severity	Plain English	DIY
CH LED	High	Your boiler is not receiving the signal to turn on the heating, which is likely caused by an issue with your external thermostat or the internal timer.	Yes
Fault led (B) illuminated (after 10 seconds)	High	Your boiler is failing to ignite a flame which means you currently have no heating or hot water.	Yes
Fault led (B) illuminated (Flame failure)	High	Your boiler has failed to light the gas flame or cannot detect that it is lit, so it has shut down for safety.	Yes
Fault led (B) illuminated (Overheat)	High	Your boiler has switched itself off because it has become too hot internally, preventing any damage to the unit.	Yes
POWER LED	High	Your boiler appears to have no power at all, meaning the control panel won't light up and the heating and hot water will not work.	Yes
RED lockout led	High	Your boiler has failed to ignite and has locked itself out for safety, meaning you currently have no heating or hot water.	Yes

Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.

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