Set Appliance State:

Gas Off
Set Multimeter to Resistance Set meter to measure resistance
Isolate Mains Power to appliance as per TOPs P4
Resistor is located next to the fan power capacitor, behind the electrical door assembly
Disconnect the black resistor lead at the terminal block

Measurement:

Measure the resistance across the disconnected black lead and the other resistor lead at the terminal block.
Resistance should be approximately 1 OHM
Refit lead after test.