Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect plug from gas valve
(loosen screw holding spark generator)
(loosen screw holding spark generator)
Measurement:
Test 1:
Measure the resistance between the top and bottom pins at the gas valve.
Resistance should be approximately 3.8kOhms.
Test 2:
Measure the resistance between the top and middle pins at the gas valve.
Resistance should be greater than 1M Ohm.
Measure the resistance between the top and bottom pins at the gas valve.
Resistance should be approximately 3.8kOhms.
Test 2:
Measure the resistance between the top and middle pins at the gas valve.
Resistance should be greater than 1M Ohm.
Isolate as per TOPs P4
and refit as necessary