Set Appliance State:
Set Multimeter to Resistance 
Isolate Mains Power to appliance as per TOPs P4
Gain access to PCB (use insulation mat as necessary)
Disconnect connector M5 from the PCB
Gain access to PCB (use insulation mat as necessary)
Disconnect connector M5 from the PCB
Measurement:
Measure the resistance between the two red
wires of connector M5.
The resistance measured will depend upon the temperature of the appliance and should conform to the table below.
wires of connector M5.
The resistance measured will depend upon the temperature of the appliance and should conform to the table below.
| Temperature °C | Resistance in kOhms |
| 20-30 | 12.0-7.5 |
| 30-40 | 7.5-5.1 |
| 40-50 | 5.1-3.9 |
| 50-60 | 3.9-2.9 |
| 60-70 | 2.9-2.0 |
| 70-80 | 2.0-1.6 |
Isolate as per TOPs P4
and refit as necessary