BoilerFaultCodesYour boiler has detected a problem with its internal temperature sensors, meaning it cannot accurately tell how hot the water is and has shut down as a safety precaution.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Flow or return sensor fault.
What causes this fault?
This fault occurs when the boiler's control board loses communication with the sensors that monitor water temperature. It is usually caused by a sensor element failing due to age or a loose electrical connection in the internal wiring. Because the boiler can no longer confirm it is operating at a safe temperature, it shuts down instantly to prevent overheating.
DIY fix possible
Locate the reset button on the boiler control panelPress and hold the reset button for 2-3 secondsWait to see if the error clears and the boiler restarts
Find a Gas Safe engineer
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A boiler cover plan would cover faults like é0 — no call-out fees, no surprises.
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