5 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Replaced by: Logic System
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 detected a minor electronic sensor issue and is running at a lower power level to keep your home warm until it can be serviced.
Your boiler has detected a problem with the sensor that monitors the temperature of your central heating water, meaning it can't heat your radiators safely.
Your boiler has detected a problem with how it moves air and exhaust gases through the system, preventing it from firing up safely.
Your boiler has detected a sensor problem that is preventing it from providing hot water correctly.
Your boiler has tried to start up but failed to ignite the gas flame, causing the system to shut down for safety.
BoilerFaultCodes