Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to AC Volts Set meter to measure AC Volts
Preheat OFF
Apply demand
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

Measure the voltage across the Live (Brown, pin 1) and Neutral (Blue, pin 2) leads at connector X1C on the PCB.
Expect mains voltage.