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14.0 Changing Components
© Baxi Heating UK Ltd 2011
14.7 Safety Thermostat (Fig. 81)
1. Pull the plug off the thermostat.
2. Remove the screws securing the thermostat to the
mounting plate on the flow pipe.
3. Reassemble in reverse order, ensuring that the plug is
pushed fully on.
14.8 Central Heating Temperature Sensor (NTC)
(Fig. 82)
1. Drain the boiler primary circuit. Pull the plug off the safety
thermostat and disconnect the in-line plug in the sensor wire.
2. Unscrew the sensor from the heat exchanger. Reassemble
the new sensor in reverse order, using a new sealing washer.
14.9 Water Pressure Sensor (Fig. 83)
1. Drain the boiler primary circuit.
2. Disconnect the two wires from the sensor.
3. Unscrew the sensor from the hydraulic outlet assembly,
examine the sealing washer and replace if necessary.
4. Reassemble in reverse order. The component is not
polarised - either wire will fit each terminal.
14.10 DHW Temperature Sensor (NTC) (Fig. 83)
1. Turn off the mains cold water supply tap and draw off the
residual domestic hot water.
2. Ease the retaining tab on the sensor away and disconnect
the electrical plug.
3. Unscrew the sensor from the hydraulic outlet assembly.
Examine the sealing washer,replacing if necessary.
4. Reassemble in reverse order. The plug will only fit one way.
Central Heating
Temperature Sensor
Safety Thermostat
Fig. 81
Fig. 82
Fig. 83
Water Pressure Sensor
Domestic Hot Water
Temperature Sensor
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