Set Appliance State:
Mains Power Off
Set Multimeter to DC Volts 
Turn Hot Water Tap On
Selector switch to Water
Run DHW boiler until water runs cold before turning mains power on
Run DHW boiler until water runs cold before turning mains power on
Gas On
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Measurement:
Allow fan to run and boiler to ignite.
Measure voltage between the two yellow wires on the modureg solenoid.
Measure voltage between the two yellow wires on the modureg solenoid.
