Set Appliance State:

Mains Power Off
Gas On; Pilot On
Selector Switch in HW position.
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Observation:

Extinguish Pilot by turning Gas Valve Control knob clockwise.
Does the Thermoelectric Valve trip out within one minute? (Listen for a 'click'.)