Set Appliance State:

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

Measurement:

Measure the resistance from pin 3 at X1 on the PCB to the soldered point shown in the picture.
Resistance should be short circuit (zero resistance).
Note:
Fuse is on the other side of these points, testing the fuse this
way saves time as otherwise the PCB needs to be removed.