BoilerFaultCodesYour boiler has shut down because it has detected internal water temperatures that are dangerously high, likely due to a circulation or sensor issue.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: The safety temperature sensor has measured temperature in excess of 95°c
What causes this fault?
This fault occurs when the water inside the boiler’s heat exchanger becomes too hot, triggering a safety shutdown to prevent damage. The most common reasons are a pump failure that stops water from moving through the system or a blockage caused by a buildup of debris and sludge. In some cases, the internal sensor itself may have failed and is providing an incorrect temperature reading to the control board.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
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