Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove electrical connector to the gas valve
Measurement:
Test 1:
Measure the resistance across the two terminals of the gas valve.
Expected resistance approximately 44.0 Ohms.
Test 2:
Measure the resistance between the right hand terminal of the gas valve and an earth connection (use the copper pipe to the gas valve as earth).
Expect a reading of 1Mohm or greater.
Are the resistances measured as expected?
Measure the resistance across the two terminals of the gas valve.
Expected resistance approximately 44.0 Ohms.
Test 2:
Measure the resistance between the right hand terminal of the gas valve and an earth connection (use the copper pipe to the gas valve as earth).
Expect a reading of 1Mohm or greater.
Are the resistances measured as expected?
Isolate as per TOPs P4
and refit as necessary