Sensing Fail, F1, F2 - LG LRE3061ST Service Manual

CHECKING FLOW CHART BY FAILURE

Sensing Fail, F1, F2?

Unplugged the unit
Is the Connector disconnected or loose?
1
1. Sensor connection
2. CN13 of Main PCB
Sensor connection CN13 connection
No
Is the resistance of thermistor normal?
2
Check:
Pins 1and 2 of CN13 wiring in main PCB
Normal- approximately 1.09kΩ at 25˚C
Yes
Reconnect or
Yes
adjust the
connection
Replace the
No
failed thermistor
CN13
-9-11-
Plug the unit
3 Is the value of thermistor normal?
(Refer below) Check with the test mode
To enter the test mode, follow these steps:
1. press the "CLEAR" button
2. press the "BAKE", "BROIL" button at the same time
3. press the "BAKE", "BROIL" button at the same time again.
Software version is displayed at the left digits
4. press the NUM "3" button
Normal : Themistor value at room temp is from 70˚F to 90˚F as the
above figure.
4
Replace the Main PCB.
Yes
Go to No 1
No