Set Appliance State:

Set Multimeter to Resistance Set meter to measure resistance
Isolate Mains Power to appliance as per TOPs P4
Disconnect plug CN5 from the control PCB

Measurement:

Please note it is important to consider the resistance of the multimeter probes when determining whether the resistances are acceptable, especially on test 2.
Test 1:
Measure the resistance between the blue and brown wires on CN5.
Resistance should be approximately 24 Ohms.
Test 2:
Measure the resistance between the black wires on CN5.
Resistance should be approximately 0.5 Ohms.