LG LMVM1945SW - Oven Fails to Operate or Respond

7-22
CONDITION CHECK RESULT CAUSE REMEDY
1. Fuse blows. Continuity.
No continuity.
Continuity.
Shorted contact at
the primary switch.
Replace fuse,
primary, monitor
switches, and
P.C.B Assembly.
No continuity.
Normal.
Defective door or
control PCB.
Replace door or
control PCB.
Fuse blows again Defective Inverter. Replace Inverter.
Malfunction of the
monitor switch.
Replace fuse,
primary, monitor
switches, and
P.C.B Assembly.
Check continuity
of monitor
switch (with
door closed).
Check continuity
of primary
switch (with
door opened).
Disconnect one
side of the lead
wires connected
from Inverter.
Replace fuse
2. Fuse does not
blow.
No continuity.
Continuity.
No continuity.
Defective power
supply cord.
Replace power
supply cord.
Defective
thermostat.
Replace
thermostat.
Check continuity
of thermostat.
Check continuity
of power supply
cord.
(TROUBLE 2) Oven does not operate at all, Display window does not display any figures,
and no input is accepted.