Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect spark electrode lead from the spark electrode and PCB
Measurement:
Measure the resistance between the ends of the electrode lead.
Resistance should be approximately 9-10kOhms.
Inspect the lead for good overall condition.
Resistance should be approximately 9-10kOhms.
Inspect the lead for good overall condition.
Isolate as per TOPs P4
and refit as necessary