Set Appliance State:
Set Multimeter to Resistance 
Isolate Mains Power to appliance as per TOPs P4
Disconnect connector CN4 from the Sequence Control PCB
Disconnect connector CN4 from the Sequence Control PCB
Measurement:
Measure the resistance across connection PN (Blue wire) and connection PL (Brown wire) on the disconnected plug.
The resistance measured should be approximately 5.3 Kohms.
Note 1:
Measurements taken at the disconnected plug not at the PCB.
Note 2:
On some models Sequence Control PCB may only have numbered connections, in which case connections will be numbered 8, 9 & 10.
Test to be carried on Blue and Brown wires on the plug that were connected to connections 8 and 9.
The resistance measured should be approximately 5.3 Kohms.
Note 1:
Measurements taken at the disconnected plug not at the PCB.
Note 2:
On some models Sequence Control PCB may only have numbered connections, in which case connections will be numbered 8, 9 & 10.
Test to be carried on Blue and Brown wires on the plug that were connected to connections 8 and 9.
Isolate as per TOPs P4
and refit as necessary