20 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Replaced by: Capriz2 24
This boiler uses LED flash patterns
Count the flashes in one repeating group before the pause. That number is your fault code. Do not reset until you have noted it. How to read fault codes →
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Your boiler has lost the ability to accurately measure the temperature of the water used for your radiators, causing it to shut down for safety.
Your boiler is struggling to read the outdoor temperature, which means it cannot automatically adjust your heating to match the weather conditions.
Your boiler is struggling to clear exhaust fumes because it cannot confirm that the internal fan is venting air correctly.
Your boiler has failed to light the flame properly or is not receiving gas, so it has shut itself down as a safety precaution.
Your boiler is struggling to accurately measure the temperature of the water used for your taps and showers.
Your boiler has stopped working because the water pressure inside the heating system has dropped too low.
Your boiler has detected that it is getting too hot and has automatically switched itself off to prevent any damage or safety hazards.
Your boiler has stopped working because the water pressure inside the heating system has dropped too low.
Your boiler has lost the ability to accurately measure the temperature of the water being sent to your radiators, so it has shut down to prevent the system from getting too hot.
Your boiler has switched itself off because it has detected an unsafe temperature level, likely due to a blockage in the water flow or a faulty temperature sensor.
Your boiler has stopped working because the water pressure inside your heating system has dropped too low to operate safely.
Your boiler has tried to light itself three times but failed to stay on, so it has safely shut down to prevent gas from building up.
Your boiler has identified a technical fault that prevents it from operating normally, meaning you likely have no heating or hot water until it is inspected.
Your boiler has stopped working because the water pressure inside the system has dropped too low to operate safely.
Your boiler is failing to light because it cannot detect a flame, meaning you currently have no heating or hot water.
Your boiler has detected that it is getting too hot and has automatically shut itself down to prevent damage.
Your boiler's temperature sensor is providing incorrect information, so the system has shut down to prevent overheating.
Your boiler is failing to light the flame or keep it running, which means it cannot provide you with heating or hot water.
Your boiler is struggling to ensure the air required for the combustion process is flowing correctly through the system safely.
Your boiler is unable to read the temperature correctly because a sensor on the outside of the system is disconnected or faulty, which has caused the boiler to shut down for safety.
BoilerFaultCodes