BoilerFaultCodesTechnical description
Overheated – try bleeding your radiators
What causes this fault?
This fault occurs when the water inside the boiler reaches an unsafe temperature, triggering a safety sensor to cut the power. The most common reasons are a lack of water flow caused by a failing pump, a blockage in the system, or air trapped within the pipework. Essentially, the heat cannot be moved away from the boiler quickly enough, causing it to overheat.
This fault is often seen in autumn when heating systems are turned on for the first time 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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