Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove lower facia panel
Disconnect the connector ST16 situated at the bottom R/H side of the PCB

Measurement:

Measure the resistance across the blue wires (3 & 4 on R/H) on the disconnected connector, approximately 20 Ohms should be present.