Set Appliance State:
Mains Power Off
Gas Off
| Isolate Mains Power to appliance as per TOP's P4 |
Set Multimeter to Continuity 
Disconnect flame sensor lead from electrode and PCB.
Measurement:
Inspect electrode lead for good general condition, signs of shorting and carry a continuity check on the lead.
Inspect flame sensor electrode for good condition and no signs of damage.
Inspect flame sensor electrode for good condition and no signs of damage.
