9 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
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Your boiler has detected an issue with its ventilation or exhaust system, causing it to automatically shut down to prevent unsafe operation.
Your boiler has stopped working because the water pressure is too low and needs to be topped up.
Your boiler has detected a problem with the temperature sensor that monitors the water being sent to your radiators, which prevents the system from heating up safely.
Your boiler has tried to light but cannot detect a flame, which means it has locked itself out for safety.
Your boiler has overheated, causing it to shut down automatically for safety.
Your boiler is struggling to detect a flame, which means it cannot stay lit to provide heating or hot water.
Your boiler has lost communication with the internal gas control system, meaning it cannot provide heating or hot water until the electrical connection is restored.
Your boiler has failed to ignite because it cannot detect the water heating up as expected, causing it to shut down for safety.
Your boiler has detected that its internal temperature sensors are giving conflicting readings, causing it to shut down for safety.
BoilerFaultCodes