LG LSGL6337F Service Manual page 61

CHECKING FLOW CHART BY FAILURE
3
Range Of resistance
Heater
Norton Igniter
SIC Igniter
Plug in the unit
4
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, and Mode knob is
placed in the Off
2. Press the "4" and "6" key at the same time for
1 second.
3. Press the "4" and "6" key at the same time for
1 second again.
4. Select the 't3' by press the 3 button.
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Resistance[ ]
Ω
Approximately
45~400
50~500
Yes
Yes
Go to No 6
No
Unplug the unit
5
Is the resistance of
thermistor normal?
Check:
Pins 5 and 6 of CN6 in main PCB
Normal- approximately 1.09kΩ at 25˚C
6
Replace the Relay PCB.
If the same phenomenon occurs even though
after replace Relay PCB, you should replace
the Main PCB
10-7
Replace the
No
defective
Thermistor
Yes