LG GR-642AVP Service Manual page 33

CLASSIFICATION STATE OF TROUBLE
COOLING is poor. REFRIGERATOR
TEMPERATURE is
poor.
DEFROSTING is NO DEFROSTING.
poor.
POINT BE CHECKED CHECKING METHOD
1. FREEZER TEMPERATURE See "FREEZER
is normal? TEMPERATURE is poor".
2. Cool air of FAN MOTOR is Certify the amount of cool air
is sufficient? and its speed touching check
supplied into
REFRIGERATOR
1. HEATER emit heat? PRESS TEST KEY on MAIN
on MAIN PWB three times.
(forced DEFROSTING)
2. DRAIN PIPE blocking? Certify DRAIN PIPE.
3. Remain ice at Certify the attaching
DEFROSTING? of DEF-SENSOR.
Certify the attaching
state(gap) of FREEZER/
REFRIGERATOR DOOR.
CONTENT
Certify the attaching state
of DOOR.
FAN MOTOR is poor. Replace FAN MOTOR.
Passage of cool air blocking. Remove impurities.
EVA frozen. See "DEFROSTING is poor".
HEATER disconnection. Replace HEATER.
TEMPERATURE FUSE Replace TEMPERATURE
disconnection. FUSE.
Connection is poor. Certify EVA connection and
wire of MAIN PWB
CONNECTOR
DEF-SENSOR is poor. Replace DEF-SENSOR.
HEATER RELAY is poor. Replace RY5 of MAIN PWB.
DRAIN PIPE blocking. Remove ice and impurities.
Certify HEATER PLATE
resistance.
Attaching is poor. Reassemble DEF-SENSOR.
DOOR sticking is poor. Reassemble DOOR.
Replace GASKET.
REMEDY