RESISTANCE THERMISTOR FLOW

Isolate Mains Power to appliance as per TOPs P4

Set Multimeter to Resistance

Remove connector from flow thermistor

Measure the resistance between the two pins on the thermistor.
Also check the thermistor is correctly attached to the pipe.

Resistances vary with temperature and should conform approximately to the table below:

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