LG LSE3092ST Service Manual page 67

FAILURE MODE FLOW CHART
Oven too hot, F-6, F-16?
Yes
Power Off
1
Is the resistance of
thermistor normal?
Check:
Pins 1and 2 of CN5 wiring in main PCB
Normal- approximately 1.09
Power Off
2
Is the Heater relay normal?
Measure the resistance of
heater relay and L.
Normal : infinite
Abnormal : continuity
L1:RD Wire
Replace the
No
failed
thermistor
Ω
at 25
CN5
Yes
Replace the
No
failed
thermistor
TAB2
Power Off
3
Is the DLB relay normal?
Measure the resistance
Normal : infinite
Abnormal : continuity
6-11
TAB5
L1
TAB3
Yes
Replace
Yes
the relay PCB
(EBR60938302)
Normal Abnormal
Yes