Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect connector plug from gas valve
Measurement:
Test 1:
Measure the resistance between the top and bottom pins of the gas valve.
Expect a resistance of approximately 4.2Kohms.
Test 2:
Measure the resistance between the top and middle pins of the gas valve.
Expect a resistance of at least 1 Mohm or greater.
Measure the resistance between the top and bottom pins of the gas valve.
Expect a resistance of approximately 4.2Kohms.
Test 2:
Measure the resistance between the top and middle pins of the gas valve.
Expect a resistance of at least 1 Mohm or greater.
Isolate as per TOPs P4
and refit as necessary