BoilerFaultCodesTechnical description
Current prim. water temp. higher than set val.
What causes this fault?
This fault occurs when the water inside your boiler gets hotter than the temperature you have requested on the control panel. The most common cause is a lack of water flow, which means the heat being produced cannot be carried away into your radiators or hot water cylinder. This is often caused by a failing pump, a blockage in the system, or a buildup of debris inside the main heat exchanger.
This fault is more frequent when the heating is first turned on after summer, as pump components can seize up after 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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