Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
CH Demand
Gain access to PCB (use Insulation Mat as required)
Selector Switch ON
Gas Control Knob in Main Burner position
Selector Switch ON
Gas Control Knob in Main Burner position
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Measurement:
Measure the High Fan Voltage across connections Fan L (Red) and Fan N (Purple) on connection CN2.
This should be approximately 240V AC.
This should be approximately 240V AC.
Isolate as per TOPs P4
and refit as necessary