Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect X20 from the PCB
Disconnect the fan connector from the fan assembly
Disconnect the fan connector from the fan assembly
Measurement:
Measure the continuity of the fan harness, connector X20 to fan connector.
Expect continuity on all tests.
Expect continuity on all tests.
| Test | Leads | 1 | Black - Black |
| 2 | Red - Red |
| 3 | Grey - Grey | 4 | Blue - Blue |
Isolate as per TOPs P4
and refit as necessary