Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove the wires from the fan assembly
Measurement:
Test 1:
Measure the resistance between the two fan terminals.
Expect approximately 40 - 60 Ohms.
Test 2:
Measure the resistance between either of the fan terminals to the earth point on the fan assembly.
Expect a resistance of 1MOhm or greater.
(O.L is acceptable because this is greater than 1MOhm)
Are the resistances as expected?
Measure the resistance between the two fan terminals.
Expect approximately 40 - 60 Ohms.
Test 2:
Measure the resistance between either of the fan terminals to the earth point on the fan assembly.
Expect a resistance of 1MOhm or greater.
(O.L is acceptable because this is greater than 1MOhm)
Are the resistances as expected?
Isolate as per TOPs P4
and refit as necessary