Set Appliance State:
Mode selector switch to Off/Reset position
Set Multimeter to Resistance 
Isolate Mains Power to appliance as per TOPs P4
Remove diverter valve actuator and disconnect electrical connector
Remove diverter valve actuator and disconnect electrical connector
Measurement:
Measure for resistance across the actuator terminals as per table below:
Isolate as per TOPs P4
and refit as necessary