BoilerFaultCodesThe boiler's internal thermometer that monitors water temperature for your radiators has developed a fault and is giving an incorrect reading.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Centra heating supply sensor error (open or short)
What causes this fault?
This fault occurs when the boiler's control board loses communication with the sensor responsible for measuring the temperature of the water leaving the unit. The most common reason is that the internal component has either burnt out or suffered a short circuit, preventing the boiler from knowing if it is safe to continue heating.
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 31 — 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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