BoilerFaultCodesTechnical description
The flue gas temperature sensor contacts have been interrupted
What causes this fault?
This fault occurs when the boiler's control board can no longer communicate with the sensor that monitors the temperature of the exhaust gases. The most common reason is that the delicate electrical pins on the sensor have corroded or the wiring has vibrated loose over time. Because the boiler cannot verify that the fumes are at a safe temperature, it shuts down immediately to prevent damage to the internal plastic components.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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