Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove connector CN303 from the PCB
Measurement:
Measure for resistance across connections of CN303 as per table below:
RESISTANCE DIVERTER VALVE ACTUATOR AND HARNESS
| Black test probe | Red test probe | Resistance |
| Pin 2 | Pin 1 | 8.5 Kohms or open circuit |
| Pin 2 | Pin 3 | 8.5 Kohms or open circuit |
Isolate as per TOPs P4
and refit as necessary