BoilerFaultCodesTechnical description
Flue probe fault
What causes this fault?
This fault occurs when the sensor responsible for measuring the temperature of the exhaust gases sends an incorrect or missing signal to the boiler's control board. The most common reason is that the probe itself has failed due to constant exposure to high temperatures, or the electrical wiring connecting the sensor has become loose or damaged.
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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