BoilerFaultCodesTechnical description
If a fault occurs with the boiler thermostat the fault display screen will show "C/H Sensor Fault".
What causes this fault?
This fault occurs when the internal sensor responsible for monitoring your central heating temperature fails to send a reliable signal to the main control board. The most common reason is that the sensor's internal electrical resistance has drifted out of range or the component has suffered a complete electrical failure due to age. In some cases, loose or damaged wiring between the sensor and the controller can also trigger this shutdown.
This fault is more common during the autumn months when the boiler is first switched on after a long summer break, as electrical components can seize or fail after being dormant.
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.