RESISTANCE FLUE SENSOR

Set Appliance State:

Set Multimeter to Resistance

Isolate Mains Power to appliance as per TOPs P4
Disconnect plug from the flue thermistor
If access is poor you may wish to remove thermistor from flue collector

Measurement:

Measure the resistance between the 2 pins for the flue thermistor.
Resistance should conform approximately to the table below.

Temperature Range (°C)	Resistance Range
0°C to 10°C	20.0kΩ - 33.0kΩ
10°C to 20°C	12.0kΩ - 20.0kΩ
20°C to 30°C	8.0kΩ - 12.0kΩ
30°C to 40°C	5.3kΩ - 8.0kΩ
40°C to 50°C	3.6kΩ - 5.3kΩ
50°C to 60°C	2.5kΩ - 3.6kΩ
60°C to 70°C	1.8kΩ - 2.5kΩ
70°C to 80°C	1.3kΩ - 1.8kΩ
80°C to 90°C	1.0kΩ - 1.3kΩ
90°C to 100°C	700Ω - 1.0kΩ

Note: Clicking on the resistance table will switch between table and graph view.