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Depending on the boiler and fault:
Arrange professional diagnosis if:
Don't attempt DIY repairs if:
No. Boiler manufacturers use their own fault-code systems, and the meaning of a code can also vary between models. Always check the code against the correct manufacturer and boiler model.
Some temporary faults may clear following manufacturer-approved checks or a reset. However, persistent or recurring faults should be professionally diagnosed.
A recurring code usually means the condition causing the fault has not been resolved. Resetting the boiler may temporarily clear the display without correcting the underlying issue.
Not necessarily. Boilers use fault codes and lockouts partly to protect the appliance and its users. However, some faults require professional attention. If you smell gas, suspect carbon monoxide or notice signs of burning or serious electrical damage, stop using the appliance and follow appropriate emergency guidance.
A fault code provides useful diagnostic information, but an engineer may still need to test the boiler to determine the actual cause.
Boilers can develop problems without displaying an error code. If you have no heating, no hot water, unusual noises, leaks or pressure problems, use our boiler troubleshooting guides or arrange an inspection.
