Oven Hot, F6 - LG LRE3085ST Service Manual

CHECKING FLOW CHART BY FAILURE

Oven hot, F6?

Yes
Unplugged the unit
1
Is the resistance of
thermistor normal?
Check:
Pins 1and 2 of CN13 wiring
in main PCB
Normal- approximately 1.09kΩ at room temp.
2
Is the Heater relay normal?
Measure the resistance of
heater relay and L.
Normal: infinite
Abnormal: shorted
CN103 1 st pin and CN102 1
CN103 1 st pin and 2 nd
Replace the
No
defected
thermistor
CN13
Yes
No
Replace the
relay PCB
Normal Abnormal
Broil(RY108) Relay
st pin
Resistance
Broil(RY109) Relay
pin
Resistance
CN103 1 st pin and CN102 2
CN101 1 st pin and 2
Yes
3
Is the DLB relay normal?
Measure the resistance
Normal : infinite
Abnormal : continuity
9-22
ConV(RY107) Relay
nd pin
Resistance
Bake(RY104) Relay
nd pin
Resistance
No
Replace the
relay PCB
DLB1(RY106) Relay
Resistance
Normal Abnormal
L2
Yes