Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove the ignition electrode from the burner door
Disconnect ignition lead at the PCB
Disconnect earth lead from electrode and the PCB

Measurement:

Test 1.
Measure the resistance of the ignition electrode and lead.
Expected resistance approximately 1 kOhm.
Thoroughly inspect the ignition electrode and lead for;
  • Wear and/or warping.
  • Contamination.
  • Cracks and/or damage to ceramic.
  • Confirm electrode spark gap is 3mm +/- 0.5mm.
    Test 2.
    Measure the resistance of the earth lead.
    Expect continuity / zero resistance.
    Also visually inspect the condition of the earth lead.