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 connector X7 from the PCB

Measurement:

Test 1.
Measure the resistance between pin 4.1 (green) and
pin 4.4 (blue) on connector X7.
Test 2.
Measure the resistance between pin 4.2 (red) and
pin 4.3 (black) on connector X7.
Expect approx. 24 Ohms on both tests.