Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Disconnect plug marked CN4 from the PCB
Measurement:
Measure the resistance across brown (live) and blue (neutral) of disconnected connector CN4.
Expected resistance approximately 46 Ohms.
Expected resistance approximately 46 Ohms.

Isolate as per TOPs P4
and refit as necessary