BoilerFaultCodesYour boiler has shut down because it has detected internal water temperatures that are dangerously high, indicating the system is overheating.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical 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 fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like E9276 — no call-out fees, no surprises.
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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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