Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect the connectors on the L/H side of the gas valve
Measurement:
Test 1:
Measure the resistance across the top pair of the four pins
on the L/H of the GV, expect approximately 80 Ohms.
Test 2:
Measure the resistance across the lower pair of the four pins
on the L/H of the GV, expect approximately 80 Ohms.
Measure the resistance across the top pair of the four pins
on the L/H of the GV, expect approximately 80 Ohms.
Test 2:
Measure the resistance across the lower pair of the four pins
on the L/H of the GV, expect approximately 80 Ohms.
Isolate as per TOPs P4
and refit as necessary