15 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Replaced by: Atlas Condensing
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Your boiler's burner has failed to ignite or stay lit, causing it to shut down for safety.
Your boiler has detected that it is running too hot and has automatically shut itself down to prevent damage.
Your boiler has stopped working because one of its internal electrical cables has become loose or disconnected.
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 overheating.
Your boiler is having trouble detecting the temperature of the water used for your taps and shower, so it has temporarily stopped providing hot water.
Your boiler has detected an issue with its internal electrical connections, preventing it from operating safely.
Your boiler has stopped working because it is unable to accurately measure the temperature of the water being sent to your radiators and taps.
Your boiler has detected that the electricity supply reaching it is too low to operate safely, causing it to shut down to prevent damage.
Your boiler is struggling because the electricity supply it is receiving from your home is unstable or not at the correct frequency.
Your boiler has stopped working because the water pressure inside the heating system has dropped too low to operate safely.
Your boiler is struggling to read the temperature outside, so it is currently operating using standard internal settings instead of adjusting itself based on the weather.
Your boiler has detected that the water pressure level inside your heating system is currently too high or too low for it to operate safely.
Your boiler has stopped heating because it is struggling to accurately measure the temperature of the water inside the system.
Your boiler's sensor is failing to detect the water pressure, so it has shut down to prevent damage to the system.
Your boiler is currently running a two-minute air-clearing routine to remove trapped air from the system before it attempts to light.
BoilerFaultCodes