Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Hinge down the PCB housing
Remove 8 way connector from PCB
Remove 8 way connector from PCB
Measurement:
Measure resistance across the two resistors.
The expected resistances depends on the appliance version and should conform approximately to the table below:
Are the resistances as expected?
The expected resistances depends on the appliance version and should conform approximately to the table below:
| Appliance | First Resistor | Second Resistor |
| 80 HE | Black - 13kOhms | White - 6.2kOhms |
| 100 HE | Black - 13kOhms | Red - 1.5kOhms |
| 133 HE | Aqua - 3.3kOhms | White - 6.2kOhms |
Are the resistances as expected?
Isolate as per TOPs P4
and refit as necessary