Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove connector CN206 from the PCB
Gain access to small PCB on the rear cover (condensate PCB)

Measurement:

Measure for resistance across pin 3 (grey) CN206 and pin 5 condensate sensor PCB 8 way connector.
Expected resistance 10 ohms or less.
Is the resistance as expected?