RESISTANCE DHW SENSOR AND HARNESS

Isolate Mains Power to appliance as per TOPs P4

Set Multimeter to Resistance

Disconnect connector plug marked ST 16 from the PCB

Measure for resistance across the connections 17 and 18 (orange wires) on the disconnected connector.

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.