LG LDG4315ST Service Manual page 58

2. Failure Code Summary
Code Description
F1 (Upper) Sensor open
F4 (Lower)
F2 (Upper) Sensor short
F5 (Lower)
F-3 Key short
F6 (Upper) Oven hot
F16 (Lower)
F17 (Lower) Conv. Fan
Motor Open
F9 (Upper) Oven
F19 (Lower) No heating
F10 (Upper) Door Lock
F20 (Lower) Fail
TROUBLESHOOTING
Oven Thermistor is open
Oven Thermistor is shorted.
1. If '25 key short' occurred 3 times in 90 seconds.
2. If communication is impossible with Touch IC more
than 60 seconds
The oven temperature is over 650
continuously for 2 minutes during cooking except self
cleaning.
During cook, if convection fan does not operate while
1 minute (cumulative time) in the period of convection
fan operation.
EXCEPT PROOF, WARM and EASY CLEAN
Starting temperature of 130 _ or less, and the oven
door is closed, the oven inside temperature does not
go up more than 10_ compared with the starting
temperature for 5minutes after the start of cooking.
If Door Lock fails while operating the Lock motor.
8-2
explanation
Check point
1.Wiring
2.Oven Sensor
1.Wiring
2.Oven Sensor
1.Wiring
2.Touch PCB
Oven Sensor
1. Wiring
2. Motor's Resistance
1.Electrical Wiring
2.Oven Sensor
1. Electrical Wiring
2. Motor's Resistance
3. Micro Switch