4 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Replaced by: CDi Classic
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Your boiler is struggling because the internal water pump is stuck or cannot circulate water properly, preventing your heating and hot water from working.
Your boiler's computer is having trouble communicating with an internal part, which prevents the system from starting up safely.
Your boiler has stopped working because the internal fan isn't spinning fast enough to safely clear away exhaust fumes.
Your boiler is struggling to accurately measure the temperature of the water, which means it has safely shut down to prevent overheating.
Not faults — these are normal operating states. Tap to expand.
BoilerFaultCodes