Oven Hot, F6 - LG LSD4913ST Service Manual

CHECKING FLOW CHART BY FAILURE

Oven hot, F6?

Yes
Unplug the unit
1
Is the resistance of
thermistor normal?
Check:
Pins 4 and 5 of CN31 in
main PCB
Normal- approximately 1.09kΩ
at 25˚C
Yes
Replace the
No
defective
Thermistor
CN31
9-17
2
Is the heater relay normal?
Measure the resistance of
Heater relay and Live.
Normal : infinite
Abnormal : shorted
Tab 02 and Tab 22 : RY12
Tab 02 and Tab 21 : RY11
Yes
No
Replace the
Relay PCB
Broil Heater
Relay
Yes
Conv. Heater
Relay