LG LSE3092ST Service Manual page 61

FAILURE MODE FLOW CHART
3
Range Of the resistance
Heater
Broil
Bake
Convection
Yes
Power On
4
Is the value of thermistor
normal?
Check: using the test mode
To enter the test mode, follow these steps:
1. press the "CLEAR" key
2. press the "BAKE", "BROIL" key
at the same time
3. press the "BAKE", "BROIL" key
at the same time again.
4. press the NUM "3" key
Normal : the sensor value is from 70_
to 90 at 25 .
˚F ˚C
No
Ω
Resistance[ ]
Approximately
13.0
17.0
80
Yes
Go to No 6
Power Off
5
Is the resistance of
thermistor normal?
Check:
Pins 1and 2 of CN5 wiring in main PCB
Normal- approximately 1.09_ at 25_
6
Replace the Relay PCB
(EBR60938302)
If it doesn't work even though changing the
Relay PCB, you should replace the Main
PCB.(EBR52349505)
6-5
Replace the
No
failed
thermistor
CN5
No