BoilerFaultCodesYour boiler has lost communication with its internal thermometer, meaning it cannot safely monitor the temperature of the water circulating through your radiators.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: No signal from the flow temperature sensor available – connect the plug to the flow temperature sensor correctly or temperature sensor could need replacing
What causes this fault?
This fault occurs when the boiler's main control board loses the electronic 'handshake' with the sensor that monitors outgoing water temperature. The most common reason is a loose or corroded wiring connection, but it can also happen if the internal sensor has developed a physical defect and can no longer send a steady signal.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A boiler cover plan would cover faults like 1074 W — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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