Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect molex connector J9 from PCB
Measurement:
Measure resistance across connections as per table.
Note:
When testing the resistance at minimum position it should be at the lowest thermostat setting before the off position, if a click is heard or the dial marker is in line with the "0" on the graduated scale the thermostat is set to off not minimum.
| Position of potentiometer | Resistance in Ohms | Across white leads pot at MAX | Less than 5 ohms |
| Across orange leads pot at MAX | Less than 5 ohms |
| Across white leads pot at Min | Less than 5 ohms |
| Across orange leads pot at Min | Approx 80-120 kOhms |
Note:
When testing the resistance at minimum position it should be at the lowest thermostat setting before the off position, if a click is heard or the dial marker is in line with the "0" on the graduated scale the thermostat is set to off not minimum.
Isolate as per TOPs P4
and refit as necessary