16 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Replaced by: Finest Gold II
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 stopped working because it failed to ignite, which means it is currently unable to provide heating or hot water for safety reasons.
Your boiler has switched itself off because it has become dangerously hot, likely due to a circulation blockage or a faulty sensor.
Your boiler has failed to light the flame after several attempts and has switched itself off for safety reasons.
Your boiler has recently had its main computer chip replaced and is waiting for you to restart it to complete the final setup.
Your boiler is operating exactly as it should and is currently burning gas to provide you with heating or hot water.
Your boiler's computer memory card is either missing or not communicating correctly, so the system has safely shut down to prevent damage.
Your boiler's computer memory has become corrupted, meaning the system can no longer read its own instructions to operate safely.
Your boiler has stopped working because it cannot confirm that waste gases are being safely pushed out through the flue, which is a necessary safety step before it can fire up.
Your boiler is failing to detect the correct amount of electrical power from your home's mains supply, causing it to shut down to prevent damage.
Your boiler is working perfectly and is currently in standby mode, simply waiting for you to turn on a tap or adjust the heating.
Your boiler has stopped working because it cannot detect a flame, meaning it is currently unable to safely heat your home or water.
Your boiler is struggling to accurately measure how hot the domestic water is, which means your tap water may come out too cold or scaldingly hot.
Your boiler has switched itself off because it has become dangerously hot, likely due to a circulation problem or a faulty safety sensor.
Your boiler has detected a safety fault and has locked itself to prevent operation, meaning you currently have no heating or hot water.
Your boiler has detected that it is running too hot and has automatically turned itself off to prevent damage or potential danger.
Your boiler's computer is unable to perform its own safety checks and has stopped working to prevent any potential risks.
BoilerFaultCodes