BoilerFaultCodesTechnical description
Flue sensor damaged
What causes this fault?
This fault occurs when the internal sensor responsible for monitoring the temperature of the exhaust gases becomes faulty or loses its connection to the control board. The boiler shuts down as a safety measure to prevent the appliance from overheating or operating with unsafe flue gas temperatures. The primary cause is typically a degraded NTC sensor or heat damage to the wiring harness connected to it.
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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