LG LSWS306ST Service Manual page 61

Plug in 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 any button
2) Press the OVEN LIGHT and turn right Lower Time
& Temp Encoder at the same time
(3) press the OVEN LIGHT and turn right Lower Time
& Temp Encoder again.
(4) press the COOK TIME button
Normal: Thermistor value at room temp is from 70℉
to 90℉
No
4
Replace the Main PCB.
TROUBLESHOOTING
Yes
Go to No 1
Current temp
7-15