12 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
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Your boiler has detected that water is not flowing correctly through the system to heat your home or water effectively.
Your boiler has stopped working because it cannot light the flame after several attempts, meaning you currently have no heating or hot water.
Your boiler has detected a safety issue with overheating or power delivery and has shut itself down to prevent damage, meaning you currently have no heating or hot water.
Your boiler is struggling to burn the gas cleanly, which can lead to a dangerous buildup of soot and harmful fumes inside the appliance.
Your boiler is struggling to breathe because the vents that pull in air for the flame have become clogged with debris or dust, preventing it from starting safely.
Your boiler is trying to start but the flame is not catching, meaning it cannot produce any heat or hot water.
Your boiler is struggling to keep its flame lit, which means it cannot heat your water or home reliably.
Your boiler is struggling because your water temperature is set too low, which is causing damaging moisture to build up inside the unit.
Your boiler is attempting to start its fan but cannot complete the ignition process, meaning it cannot provide you with heating or hot water at this moment.
Your boiler is struggling to receive the correct amount of gas it needs to run safely and efficiently.
Your boiler is struggling to get the gas supply it needs to stay lit, which is causing it to cut out intermittently.
Your boiler is struggling to push warmth around your home because the internal parts responsible for moving or measuring hot water are not working as they should.
BoilerFaultCodes