Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect the leads from the spark electrode
Carefully remove the electrode from the combustion box door
Carefully remove the electrode from the combustion box door
Measurement:
Measure the resistance between the tip of the spark electrode and the lead connection point.
Expect continuity/ zero resistance.
Note:
Before reassembly check the integrity of all disturbed gaskets and seals and replace as necessary.
Expect continuity/ zero resistance.
Note:
Before reassembly check the integrity of all disturbed gaskets and seals and replace as necessary.
Isolate as per TOPs P4
and refit as necessary