22 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Replaced by: Britony Combi SE
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Your boiler is failing to ignite its flame, which means it cannot produce any hot water or heating for your home.
Your boiler is struggling to keep its internal ignition flame lit, which prevents the main burner from starting and means you will currently have no hot water or heating.
Your boiler is failing to keep its small starter flame lit, which prevents the main system from firing up to provide you with heating or hot water.
Your boiler is failing to keep its internal pilot flame lit, which means it cannot safely ignite the main burner to provide heat or hot water.
Your boiler is failing to ignite the flame needed to produce heat or hot water, meaning it has currently stopped working.
Your boiler is struggling to keep the flame lit while you are trying to use hot water, causing it to cut out during use.
Your boiler is currently unable to ignite its main flame, meaning it cannot produce any hot water or heating for your home.
The internal valve used to control your boiler's gas supply is sticking, which is preventing the system from igniting properly.
Your boiler is struggling to heat the water to the required temperature, likely due to a sensor reading issue or a flow problem.
Your boiler has detected that the main gas control knob or internal valve is not moving or operating as it should, which is preventing the boiler from firing up safely.
Your boiler is not burning fuel correctly, which is causing dangerous soot buildup and indicates a significant risk of carbon monoxide production.
Your boiler is not burning fuel correctly, which is causing soot buildup and indicates a serious issue with the combustion process.
Your boiler has stopped working because the water pressure inside the heating system has dropped too low.
Your boiler is struggling because it has detected air or built-up debris circulating inside it, causing loud banging or kettling noises.
Your boiler is struggling to light smoothly, resulting in a small mini-explosion inside the unit when it finally fires up, which can damage your internal components.
Your boiler is making loud banging or kettling noises because the internal components are struggling to process heat due to a buildup of mineral deposits or restricted water flow.
Your boiler is struggling to detect enough water flowing through it to safely start your hot water or heating.
Your boiler is failing to heat your water properly because it is struggling to get enough gas or manage the water flow effectively.
Your boiler is failing to ignite the main flame, which means you currently have no heating or hot water because the system cannot produce heat safely.
Your boiler is failing to ignite because it cannot start the initial pilot flame required to begin the heating process.
Your boiler is failing to keep its small pilot flame lit, which prevents the main heating system from starting up safely.
Your boiler is struggling to keep its ignition flame lit, which prevents the main burner from starting and stops your heating and hot water from working.
Not faults — these are normal operating states. Tap to expand.
BoilerFaultCodes