Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect the thermistor connector from the PCB (black leads)
Measurement:
Measure between each pin of the thermistor connector and a suitable earth.
Greater than 1M Ohm expected.
Remove the thermistor from its housing above the primary heat exchanger.
Inspect thermistor for any signs of damage and its housing for any signs of water ingress.
Greater than 1M Ohm expected.
Remove the thermistor from its housing above the primary heat exchanger.
Inspect thermistor for any signs of damage and its housing for any signs of water ingress.
