LG LSWS306ST Service Manual page 53

Oven does NOT heat, F9
Unplug the unit
1
Is the Connector disconnected
or loose?
(1) Between Main PCB and
Relay PCB (Main : CN51
Relay : CN11)
(2) Electric wiring of relay PCB
All taps.
(3) Electric wiring of electric element
CN51
All Taps
No
TROUBLESHOOTING
Reconnect.
Yes If defective harness,
Replace or fix
CN11
Broil
(Inner & Outer)
Conv. Heater
Bake
2
Is the connection of heater
normal?
Measure the resistance
of each heater.
(The resistance is shown
below)
Outer Broil
Inner Broil
Yes
7-7
Replace the
No
Failed heater
Bake
Conv. Heater