Set Appliance State:

Set Multimeter to Resistance Set meter to measure resistance
Isolate Mains Power to appliance as per TOPs P4

Measurement:

Measure resistance between A10, on PCB (track-side, middle right)
and the middle connection of microswitch SW2 (black connector).
Note:
Although SW2 has three connections only the top two are used.
It is the lower of these two connections which is used in the resistance measurement.