Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove connector from fan
Measurement:
Test 1:
Measure the resistance between the fan terminals as below:
Expected resistances as below.
Test 2:
Measure the resistance between each of the fan terminals and earth.
Expect greater than 1M Ohm (or O.L on meter)
Are the resistances measured as expected?
Measure the resistance between the fan terminals as below:
Expected resistances as below.
| Terminals | Resistance in Ohms |
| 4 - 1 | Greater than 1 MOhms |
| 4 - 2 | Greater than 1 MOhms |
| 4 - 3 | Greater than 1 MOhms |
| 4 - 5 | Greater than 1 MOhms |
Test 2:
Measure the resistance between each of the fan terminals and earth.
Expect greater than 1M Ohm (or O.L on meter)
Are the resistances measured as expected?
Isolate as per TOPs P4
and refit as necessary