BoilerFaultCodes
The most common British Gas faults
Your boiler has switched itself off because it has become too hot internally, usually due to a lack of water flow or a circulation problem.
Check if your radiator valves are open to allow water to flow.Check your boiler pressure gauge and top it up to 1.5 bar if it is too low.Press the reset button on the front of the boiler.
Your boiler is failing to light the gas or isn't staying lit, meaning you won't have any heating or hot water until it is reset or repaired.
Check that your gas meter is turned on and gas is reaching other appliances like a hob.If you have a pre-payment meter, ensure you have sufficient credit.Press the Reset button on the front of the boiler for five seconds.
Your boiler has sensed that there is not enough water flowing through the system, causing the pump to run without liquid.
Check the pressure gauge on the boiler or filling loop; it should be between 1 and 1.5 bar.If pressure is low, use the filling loop valves to top up the system water.Check that all radiator valves and isolation valves are fully open.Restart the boiler to clear the fault code.
Your boiler has lost communication with its external controls or internal wiring kit, preventing it from heating your home.
Full guide for 330+ F78Your boiler has detected that the internal component responsible for clearing exhaust gases is not operating correctly, so it has safely shut down to prevent any unsafe buildup.
Full guide for 330+ F3Your boiler is lighting up, but the flame is cutting out shortly after, meaning your heating and hot water will not stay on.
Full guide for 330+ F4Your boiler has detected that it is running too hot and has automatically switched itself off to prevent any damage.
Full guide for 330+ F5Your boiler is struggling to read the temperature of the water flowing to your radiators, so it has turned itself off to prevent overheating.
Full guide for 330+ F6Avoid the next call-out bill
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