Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect flue sensor inline connector
Measurement:
Measure the resistance across the pins of inline connector which connects to the flue sensor.
RESISTANCE FLUE TEMPERATURE SENSOR
Resistances vary with temperature and should conform approximately to the table below:
| Temperature Range (°C) | Resistance Range |
|---|---|
| 0°C to 10°C | 20.0kΩ - 32.0kΩ |
| 10°C to 20°C | 12.0kΩ - 20.0kΩ |
| 20°C to 30°C | 8.1kΩ - 12.0kΩ |
| 30°C to 40°C | 5.4kΩ - 8.1kΩ |
| 40°C to 50°C | 3.7kΩ - 5.4kΩ |
| 50°C to 60°C | 2.6kΩ - 3.7kΩ |
| 60°C to 70°C | 1.9kΩ - 2.6kΩ |
| 70°C to 80°C | 1.4kΩ - 1.9kΩ |
| 80°C to 90°C | 1.0kΩ - 1.4kΩ |
| 90°C to 100°C | 800Ω - 1.0kΩ |
Note: Clicking on the resistance table will switch between table and graph view.
Isolate as per TOPs P4
and refit as necessary