Set Appliance State:
Mains Power Off
Isolate Mains Power to appliance as per TOPs P4
Gas On
Measurement:
Disconnect the thermocouple wire from the pilot valve and attach the red lead from the multimeter to the thermocouple wire inner sheath. Attach the multimeter black lead to the boiler chassis.
Depress and hold in the green gas control knob and ignite the pilot with a match. Keep the gas control knob depressed and measure the voltage from the thermocouple.
Depress and hold in the green gas control knob and ignite the pilot with a match. Keep the gas control knob depressed and measure the voltage from the thermocouple.
Isolate as per TOPs P4
and refit as necessary