Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove electrode assembly from boiler

Measurement:

Thoroughly check the spark electrode for;
  • Resistance, tip of electrode to ignition lead connector, expected resistance 1Kohm.
  • Wear and/or warping
  • Contamination
  • Cracks and/or damage to ceramic
  • Confirm electrode gap is 5mm +/- 1mm.
    Note.
    Refer to adapt regarding any gasket / seal replacement requirements.