BoilerFaultCodesYour boiler has shut down because the water inside it has become dangerously hot.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Primary flow temperature exceeded 95°c
What causes this fault?
This fault occurs when the water inside the boiler cannot move away from the burner fast enough, causing it to reach a dangerously high temperature. The most common reasons are a failed internal pump that isn't pushing the water around, or a blockage caused by a build-up of sludge and debris in the system. When this heat spike is detected, the boiler shuts down immediately as a safety precaution to prevent internal damage.
This fault is more common in autumn when heating is turned on for the first time after summer, as pump components can seize during long periods of inactivity.
DIY fix possible
Check if your radiator valves are fully open to allow water to circulate.Ensure your system pressure is between 1 and 1.5 bar on the front gauge.Restart the boiler by holding the 'reset' button for five seconds once the system has cooled down.
Find a Gas Safe engineer
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Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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