BoilerFaultCodesTechnical description
Boiler overheat tripped
What causes this fault?
This fault occurs when the water inside the boiler reaches an unsafe temperature, triggering a safety switch to prevent damage. It is usually caused by a circulation failure, such as a seized internal pump or a blockage in the system prevents heat from being carried away quickly enough.
This issue often surfaces when the heating is first turned on after summer, as pump components can seize up during long periods of inactivity.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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