BoilerFaultCodesYour boiler has stopped working because it cannot get a temperature reading from the main pipe where hot water leaves the unit.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Outlet probe with contact open
What causes this fault?
This fault occurs when the boiler's control board loses communication with the sensor responsible for monitoring the temperature of the water leaving the unit. The most common reason is that the sensor has developed an internal electrical failure or the wiring connecting it to the main circuit board has become loose or damaged. Without this data, the boiler shuts down as a safety precaution to prevent the system from overheating.
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 E43 — 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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