Sensing Fail, F1 (F4), F2 (F5) - LG LUTE4619SN Service Manual

Sensing Fail, F1 (F4), F2 (F5)?

Unplug the unit
1
Is the Connector disconnected or loose?
(1) Sensor connection
(2) CN60 and CN61 of Main PCB
Upper Sensor Lower Sensor
connection connection
CN60
CN61
No
TROuBLEShOOTING
Reconnect or adjust the
Yes
connection
8-15
2
Is the resistance of thermistor normal?
Check:
Pins 4 and 5 of CN60 and pins 5 and 6 of CN61
in main PCB
Normal- approximately 1.09kΩ at 75ºF(25ºC)
CN61
Yes
Replace the defective
No
Thermistor
CN60