BoilerFaultCodesTechnical description
Flue gas probe short-circuited
What causes this fault?
This fault occurs when the internal sensor responsible for monitoring the temperature of exhaust gases identifies an electrical short-circuit. The most common reason is that moisture or heat stress has damaged the sensor's internal wiring, causing it to send an incorrect signal to the main control board. As a result, the boiler shuts down immediately to prevent potential damage to the flue system or the heat exchanger.
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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