BoilerFaultCodesYour boiler has detected a fault with the internal thermometer that monitors water temperature, 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: Flow temperature sensor short circuit or burnt out
What causes this fault?
This fault occurs when the sensor responsible for monitoring the heat of the water leaving the boiler fails to send a correct electrical signal. The most common reason is that the sensor has developed an internal electrical short or the sensitive internal components have worn out due to constant temperature changes. In some cases, the wiring connecting that sensor to the main control board may have 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 E2 — no call-out fees, no surprises.
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