LG MH-1355M Service Manual page 35

CONDITION
CONVECTION
CONV. indicator lights, but oven
does not go into cook cycle
when START pad is touched.
Temperature in the oven cavity
is lower or higher than preset.
NOTE : • MAKE SURE THE WIRE LEADS CORRECTLY POSITIONED.
• WHEN REMOVING THE WIRE LEADS FROM THE PARTS, BE SURE TO GRASP THE CONNECTOR, AND NOT
THE WIRES.
• WHEN REMOVING THE MAGNETRON, BE SURE TO INSTALL THE MAGNETRON GASKET IN THE CORRECT
POSITION AND GOOD CONDITION.
CAUSE
Child Lock is set.
Defective relay 2 of P.C.B.
Defective thermistor.
Open or loose wire connection
to the above components.
Open or loose connection to
P.C.B.
Defective relay 4 or 2 of P.C.B.
Defective convection heater
element.
Defective thermistor.
Defective circulation motor.
Defective drive mechanism of
circulation fan.
Defective Solenoid.
Defective air duct assembly.
– 35 –
TEST PROCEDURE OR
CORRECTION
This is not a defect.
Touch "0" key pad till a beep
sounds. (See page 14.)
Test procedure relay 2 of
P.C.B. (See page 40.)
Test procedure thermistor.
(See page 40.)
Check and repair wiring.
Check and repair wiring.
Test procedure relay 4 and 2 of
P.C.B. (See page 40.)
Test procedure convection
heater. (See page 39.)
Test procedure thermistor.
(See page 40.)
Test procedure circulation
motor. (See page 38.)
Check and repair.
Test procedure solenoid.
(See page 39.)
Check and repair.