RESISTANCE DHW THERMISTOR

Isolate Mains Power to appliance as per TOPs P4

Set Multimeter to Resistance

Disconnect connector to DHW thermistor (requires flue pipe & sump / condensate removal)

Measure the resistance across the 2 pins for the flow thermistor.

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.