Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove connections at fan
Measurement:
Test 2:
Measure the resistance between the fan terminals.
Resistance should be approximately 48 Ohms.
Test 1:
Measure the resistance between either of the fan terminals to a suitable earth point.
Resistance should be greater than 1M Ohm (or O.L)
Measure the resistance between the fan terminals.
Resistance should be approximately 48 Ohms.
Test 1:
Measure the resistance between either of the fan terminals to a suitable earth point.
Resistance should be greater than 1M Ohm (or O.L)
Isolate as per TOPs P4
and refit as necessary