BoilerFaultCodesYour boiler has detected a problem with the sensor that monitors the water temperature returning from your radiators, preventing the system from operating correctly.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Central heating return sensor error – possibly damaged
What causes this fault?
This fault occurs when the boiler's control system receives an incorrect or missing signal from the sensor that monitors water returning from your radiators. The most common reason is that the internal components of the sensor have degraded over time or the electrical connection between the sensor and the main control board has become loose or damaged.
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.
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A boiler cover plan would cover faults like E24 — no call-out fees, no surprises.
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