BoilerFaultCodesYour boiler's internal computer has detected a fault with one of its built-in temperature sensors, causing the system to shut down for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Sensor error (internal)
What causes this fault?
This fault occurs when the boiler's control system receives an incorrect or missing signal from its internal temperature sensors. The most common reason is a physical failure of the sensor's internal components or a loose connection in the wiring that prevents the computer from monitoring heat levels safely.
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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A boiler cover plan would cover faults like E11 — no call-out fees, no surprises.
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