Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Disconnect connector X4 from the PCB
Measurement:
Measure the resistance between pins 8 and 9 (white wires) on X4 connector.
Resistance should confirm approximately to the table below.
Resistance should confirm approximately to the table below.

Isolate as per TOPs P4
and refit as necessary