FLOW SENSOR RESISTANCE

Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4

Set Multimeter to Resistance

Disconnect plug (pink and black leads, left side above diverter) from flow sensor
Ensure Primary Heat Exchanger is below 60° C, carefully unclip and remove sensor

Measurement:

Measure resistance across the exposed sensor terminals.

Resistances vary with temperature and 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.