BoilerFaultCodesTechnical description
The temperature flow sensor has measured a temperature in excess of 95°c
What causes this fault?
This fault occurs when the water inside the boiler cannot circulate effectively, causing it to reach a near-boiling temperature almost instantly. The most common reasons are a failed internal pump that isn't pushing the water around or a heavy buildup of debris and sludge blocking the narrow passages within the heat exchanger.
This issue often surfaces during the first cold spell of autumn when the heating is turned on after being dormant all summer, which can cause internal pumps to seize.
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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