Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Gain access to PCB (use Insulation Mat as required)
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.