Set Appliance State:

Set Multimeter to Resistance Set meter to measure resistance
Isolate Mains Power to appliance as per TOPs P4
Ensure appliance is switched off.
Remove the Solenoid Supply Plug from the top of the Gas Valve Assembly.

Measurement:

Measure the Resistance of both Solenoid Coils.
Measure a Resistance across EV1 and COM, the
Resistance should be approximately 900 ohms.
Measure the Resistance across EV2 and COM, the
Resistance should be approximately 900 ohms.
Note:
Replace Solenoid Supply Lead Plug after Test.