BoilerFaultCodesTechnical description
Short circuit of the temperature sensor at the heating block – temperature sensor may need replacing
What causes this fault?
This fault occurs when the boiler's internal computer receives an incorrect electrical signal from the sensor that monitors the water temperature. This is usually caused by the sensor failing internally due to age or heat stress, or moisture getting into the electrical connections and causing a short circuit.
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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