LG LMX25964 Series User manual

LG
REFRIGERATOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
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MODEL : LMX25964** COLOR : STAINLESS

CONTENTS
SAFETY PRECAUTIONS. ........ecescescceseeeeeeseeeeeeseeseeseeeseesceesaesenescessnesseesnenseeseeeaenenaeaenenanaeenensaesnessansseesaeeseesaeesesaeeneeeenteseneesenenes 2
1. SPECIFICATIONS. ooo. .s cee ceececeeecesceeeeeeceeeces ce enenseeenensensncenenenaesenenensaneneesaesaessanssensaeesessaessess cesses sesaeesaeeeaesaseneeeeseneneeneneneneeaes 3
2. PARTS IDENTIFICATION ..........ccceccesceecceeeeeeceeeeeeeeeee cane eee nanenae nse esnen snes neues eens eee eens ee nee nena eae nen enna enna 4
3. DISASSEMBLY 00... ceseecccecceeceeseeeeeeeeeeeceseeeecenenenenneeeaeesaecaeesaesaasaesaaesaeseeegaesaese sess ceases seeeeeaeeeeesaeesaesaesaesnaeseenseneeeseaees 5-14
REMOVING AND REPLACING REFRIGERATOR DOORS 0000... ceccceccceccecceeceeseeeeeceeeeeecaeeeeecaeecaecaaecaeeaaeaeeaesareneenseneeeneenes 5
DOOR INSTALLATION ooo... ccccccccecceececseeececaceseeceeeeaecaeceaecaecsaecaecsaeceeseaeceneseesenesececaeeeaecacecaecaaecaeseaesaesaseaeesaesaresaeeeeseseseneeaeeenes 6
DOOR oo ceececcceccecccecceseceeceseceecesecenesessaecsnecaeeeaecacecaecaaecaecaaecaecsassaeceaeaessaeseeseaeseeseaeseneseeeaecaeecaeeececaeesaesaeeeeecaseeeseseetenseeteaes 7-8
TO REMOVE THE DISPENSER 20. .ecccceccceccecccececeeeeneeeeeceeeacecaceaaecacesaecaaeeaeceaesaeceaeaecaeseaesieeeaesecesneeaeseeesaeeeeesaeeeeeieeseeeeaees 8
DOOR ALIGNMENT ooo..ececcceccecceescesceceeeececacesnecacesaecaeceaecaecsaecaecsaecaesaecenesaesecesenecaeeeaecacecaecaaecaeseaesaeceaeeaeenesareeaeseeeeenseneeaeeenes 8
FAN AND FAN MOTOR(Evaporat0r) ........ccccsccccssccceesercesenseccsenceceaececsnaececeneeccaaececenaeceseneececassecsensesseasecscassecsenssessureescuteeesanes 8
ICE FAN SCROLL ASSEMBLY REPLACEMENT ooo... .eccceccccccescececeseeeeeeaeecaeeacecaecaaecaeeeaecaeeaecaeeeaeseeeaeseeeseeteneseeeeeeeeeieenaees 9
DEFROST CONTROL ASSEMBLY o....eccccceceescceceecceeececeeeceseeseceaecsesesecneceeeeaecacecaecacecaeeaaecaaesaeseacsaeceaeeaeceeesaeseeeeeseseeeeeeaeeeees 9
LAMP ooeeeececcecccecceeccesceseeeceseceeesesenecseecaeececacecaecacecaecaaesaecsaesaeseaesaessaesaesaeseeeaesenesaeecaecacecaeeacecaesaaecaesaecaecsaeseeesaeeneeeeseneeeeeenes 9
CONTROL BOX-REFRIGERATOR oo. .cccceccceccesceececececeecececaecaaeceeceaecaecaaecaecaaesaesaesnesaeseneseesaeeececaeesaeseaeeaeseaeeeessuseareneeereaes 9
MULT DUCT oe cececceccecceecceeceeceeceseeeeeeaeeaecace caeeacecaceaaecacesaecaeceaeceecsaecaesaecaeseaeseeesaeseneseeseneseecaeeecesaeesaeceeesaeseaseeesseereeteas 10
MAIN PWB, DISPLAY PWB REPLACEMENT, FUNNEL REPLACEMENT. ...........:cccccececceeeeceeeceeceeeceeceeeeeseaeeereeareneeeneaes 10
SUB PWB FOR DISPENSER, DUCT DOOR REPLACEMENT, ICE CORNER DOOR
REPLACEMENT, ICE MAKER ASSEMBLY o.uu....cccecccecceecceccecces cesses cesses eeseceneeeeeeaeceecaeeeaesacecaecacecaeseaesaeeeaseeesiseereseneereeas 11
AUGER MOTOR COVER, AUGER MOTOR REPLACEMENT ou......ecccecccccecceeeceseececeeeeceeceeecaecaeceeseaecaeeeaeseseseeteneseneeaeeeees 12
DOOR ICE BIN 0 eeccecccecceeceecceseeecceneeeneeaeeeeecace caeeacecaceaaecaecaaecaecsaecaecsaecaessaecaeseaeseeeaeseneeeeseneseecaesacecaeesaeceeeeaeseaseeeeuseereeteas 13
HOW TO REMOVE AND REINSTALL THE PULLOUT DRAWER ...0.....ccccceccececececeececeeeececeeeeceaeeaeceeeaeeeeseeseneeareeseeees 14-17
A. ADJUSTMENT nnn. .eceeececeeeccesesseeeeeeenencesececesncencesecensesecenaeenaeaaecaesaaecaesaaecaessaesaessaessessaessessseeseeseesesesaeenaeeesenaeeeseneseaeenes 18-19
COMPRESSOR oooeececccecceceesececceeeeeceeeceeecaeceaeeseceaeceecenesenesaesenecaeeeaecace caeeaaecaaesaecaeceaesaecaeseeseaeceeseaeseeeeeseeesereeaeseeesaeeeeeieeeaees 18
PTC-STARTER .ecccceccceccesceecceseeeeceneeeneeaeeenecace caecacecaeeaaecaecaaecaeceaeceecsaecaesaecaesaeseeeaeseneceseneseesaesacesaeesaececeaeseaseeeeeseeseeteas 18
OLP(OVERLOAD PROTECTOR) .0....cccccccecccceceeeececceecceeeaeceeceseceeeeseceneceneeaeeenecaeecaecacecaecaaecaeeaaecaeseaesaeseaseaeseaesenseeseneeneeenes 19
TO REMOVE THE COVER PTC oui. .eccccccccccescceceeseeecececescecacesaeceaesaeceaeseeceaeaessaeeaeseeecaeseceseneeaeeenecacesaeeaaecaesaaesiseseeeareeeeeeeeas 19
5. CIRCUIT DIAGRAM oan... ceececceccceccescneeceeecencesecseceseeenceseeeneeseecneeenecaaeene seas cae eaansaesaansaessaesaessaessaseaseseseeseseseaseneseaaeeeaeaeeaeeaes 20
6. TROUBLESHOOTING. ooo... ceeceecceccescceeceeecencesncenceseceneeseecnaeeaecaeecaesaaecaesaaecaesaaesaessaes sess aes sess seeseeesaeseseaseeeaeaaeeeaeeaseneseaeeaes 21-25
COMPRESSOR AND ELECTRIC COMPONENTS. 0... ceccecececeecececeeeececeeeeceeceaeceeceaecaeceaeseeeaeceneseseaesececaeeeaesaeesaesaeeeeenaees 21
OTHER ELECTRICAL COMPONENTS. ......ccececcecccecceecceecesecesceseceeeeseeeneceeeeneeecaeecaecacecaecaaecaeeaaesaeceaecaeeeaseaesesesenseseseneeaeenes 22
SERVICE DIAGNOSIS CHART o.oo. .ecceccecccecceecceeeeeeeeceeececeeeece cae caecacecaecaaecaecaaecaeceaesaecaaesaeseaesaeseaeseeeeseseeesaeesaeseeseeseeeieenaees 23
REFRIGERATION CYCLE oon. cecceeccccccecececececeeceeececeeaecaeceaecaeceaecaecsaeceeseaesenesaeseneseecaesececaeeeaecacecaeseaeaeseaseseeeseeresunestees 24-25
7. OPERATION PRINCIPLE & REPAIR METHOD OF ICEMAKER ............eecccsceecceeeeeecenceeeceneeeeceneeenenseeseeeeaesenseanenenaes 26-28
8. DESCRIPTION OF FUNCTION, CIRCUITS & ERROR CODES ooo. ..ececceccesceeeceeeeeeceseeeeceneeeneeneeeneesae ceases seaseanenaneaes 29-45
9. EXPLODED VIEW & REPLACEMENT PARTS LIST oon... see ceeececceeececeeeeceneeeneneeseeenceseeseceseeseeeseeenaeseecnaeeaeseeesanseneeaeeans 46-
SAFETY PRECAUTIONS
Please read the following instructions before servicing your
refrigerator.
1.
2.
3.
Unplug the power before handling any electrical
componets.
Check the rated current, voltage, and capacity.
Take caution not to get water near any electrical
components.
. Use exact replacement parts.
. Remove any objects from the top prior to tilting the
product.

1. SPECIFICATIONS
25 cu. ft
ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS
DOOR DESIGN Side Rounded VEGETABLE TRAY Transparent Drawer Type
DIMENSIONS (inches} 35 a/, X 34 i, X 69 s/, (WXDXH) 25cu.ft | | COMPRESSOR Linear
NET WEIGHT (pounds) 308.65 (25cu.ft) EVAPORATOR Fin Tube Type
COOLING SYSTEM Fan Cooling CONDENSER Spiral Condenser
TEMPERATURE CONTROL Micom Control REFRIGERANT R-134a (145 g)
DEFROSTING SYSTEM
Full Automatic
Heater Defrost
LUBRICATING OIL FREOLa8G (180 ml)
DEFROSTING DEVICE SHEATH HEATER
DOOR FINISH Stainless REFRIGERATOR | LED Module(21)
LAMP
HANDLE TYPE Bar FREEZER Bulb Lamp
INNER CASE ABS Resin
INSULATION Polyurethane Foam
DIMENSIONS
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Description LMX25964**
Depth w/ Handles A 34 1/4 in.
Depth w/o Handles B 31 1/4 in.
Depth w/o Door Cc 27 7/8 in.
Depth (Total with Door Open) D 46 1/2 in.
Height to Top of Case E 68 3/8 in.
Height to Top of Door Hinge F 69 3/4 in.
Width G 35 3/4 in.
Width (door open 90 deg. w/o handle) H 39 1/4 in.
Width (door open 90 deg. w/ handle) | 44 1/4 in.

2. PARTS IDENTIFICATION
@ ADJUSTABLE REFRIGERATOR SHELVING
The refrigerator compartment shelves are adjustable Ice Bank
to allow flexibility for storage needs.
Ice Door
© MODULAR DOOR BINS
Three interchangeable bins can be arranged to
suit your storage needs.
© LED INTERIOR LAMPS
@ FIXED DOOR BIN
@ INTERIOR LAMP
@ BOTTLE HOLDER (OPTIONAL)

3. DISASSEMBLY
3-1 REMOVING AND REPLACING REFRIGERATOR DOORS
@ Removing Refrigerator Door
A CAUTION : Before you begin, unplug the refrigerator. Remove food and bins from doors.
> Left Door -FIG. 2
1. Disconnect water supply tube by pushing back on the disconnect ring (4).-FIG. 1
2. Open door. Loosen top hinge cover screw (1).
Use flat tip screwdriver to pry back hooks on front underside of cover (2). Lift up cover.
. Disconnect door switch wire harness. Remove cover.
. Pull out the tube(3).
. Disconnect the two wire harnesses (4). Remove the grounding screw (5).
. Rotate hinge lever (6) counterclockwise. Lift top hinge (7) free of hinge lever latch (8).
A CAUTION : When lifting hinge free of latch, be careful that door does not fall forward.
7. Place door, inside facing up, down onto a non-scratching surface.
> Right Door -FIG. 3
1. Open door. Loosen top hinge cover screw (1). Lift up cover (2).
2. Disconnect door switch wire harness. Remove cover.
3. Disconnect wire harness (3).
4. Remove the grounding screw (4).
4. Rotate hinge lever (5) clockwise. Lift top hinge (6) free of hinge lever latch (7).
A CAUTION : When lifting hinge free of latch, be careful that door does not fall forward.
5. Lift door up from middle hinge pin door.
6. Place door, inside facing up, down onto a non-scratching surface.
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&
Figure 2 Figure 3
Figure 1
1)Insert the tube until you can see only one of the lines
printed on the tube.
2)Atter inserting, pull the tube to ascertain that it is secure.
3)Assemble clip.
LER
ES
rect
Correct Incorrect

3-2 DOOR
e@ Door Gasket Removal
1. Remove door frame cover
Starting at top of cover and working down, snap cover
out and away from door.
Frame Cover
Handle
Figure 1
2. Remove gasket bracket clips
There are two clips on each door. Start bracket removal
near one of the middle clips.
1)Pull gasket back to expose gasket bracket clip and
door frame.
2)Insert a flat tip screwdriver into seam between gasket
bracket and door frame and pry back until clips snap
out.
3)Continue prying back along seam until all clips snap
out.
Gasket
Door Bracket Clip
Frame
Flat Tip
Screwdriver
Gasket
Bracket
Figure 2
3. Remove gasket
Pull gasket free from gasket channel on the three
remaining sides of door.
Figure 3
@ Door Gasket Replacement
1. Insert gasket bracket clips
1) Insert gasket bracket edge beneath door frame edge.
2) Turn upper gasket bracket spring so that the spring
ends are in the door channel.
3) Push in clip until you hear it snap securely into place.
Oo LH Bracket Clip
|
|
Spring
ll
Door
Frame
Incorrect
Figure 4
Correct
4) Push in remaining clip until you hear it snap securely
into place.
Note : Make sure that no part of gasket bracket edge
protrudes from beneath door frame edge.
2. Insert gasket into channel
1) Snap gasket assembly into the door bracket.
<Inserting the Gasket Assembly into the Bracket Door>
Pl Yl Fr
Correct
Incorrect Figure 5

2) Press gasket into channels on the three remaining sides 3-3 DOOR ALIGNMENT
of door. .
If the space between your doors is uneven, follow the
instructions below to align the doors:
1. With one hand, lift up the door you want to raise at
middle hinge.
2. With other hand, use pliers to insert snap ring as shown.
3. Insert additional snap rings until the doors are aligned.
(Three snap rings are provided with unit.)
Figure 6
3. Replace door frame cover
Starting at top of cover and working down, snap cover
back into door.
Figure 8
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*
3-4 FAN AND FAN MOTOR(EVAPORATOR)
1. Remove the freezer shelf. (If your refrigerator has an
icemaker, remove the icemaker first)
2. Remove the plastic guide for slides on left side by
unscrewing phillips head screws.
3. Remove the grille by removing one screw and pulling the
grille forward.
4. Remove the Fan Motor assembly by loosening 2 screws
and disassembling the shroud.
5. Pull out the fan and separate the Fan Motor and Bracket.
nN
Figure 7
NN FAN MOTOR
SPA
(G
~~ GRILLE Figure 9
CAUTION
DO NOT ATTEMPT TO REMOVE THE MULLION :
REFRIGERANT LINES!

*Ice Fan Scroll Assembly Replacement 3-6 LAMP
Unplug Refrigerator, or disconnect power at the circuit
breaker.
If necessary, remove top shelf or shelves.
1) Remove the plastic guide for slides on left side by
unscrewing phillips head screws.
2) Pull the grille forward as shown in the second picture.
3) Disconnect wire harness of the grille.
4) Remove the scroll assembly by loosening all screws. 3-6-1 Refrigerator Compartment Lamp
1) Release 2 screws.
2) Hold both ends with your both hands and pull it
downward to remove it.
Figure 12
3) Use a flat tool as shown below to remove the cover
lamp.
3-5 DEFROST CONTROL ASSEMBLY
Defrost Control assembly consists of Defrost Sensor and Figure 13
FUSE-M. 4) As shown below, use a flat tool to remove the cover
The Defrost Sensor works to defrost automatically. It is lamp.
attached to the metal side of the Evaporator and senses its
temperature. At 46°F (8°C), it turns the Defrost Heater off.
Fuse-M is a safety device for preventing over-heating of the
Heater when defrosting.
1. Pull out the grille assembly. (Figure 10)
2. Separate the connector with the Defrost Control
assembly and replace the Defrost Control assembly after
cutting the Tie Wrap. (Figure 11)
Cover, Lamp LED, Assembly Case Lamp
GRILLE ASSEMBLY DEFROST-CONTROL Figure 14
ASSEMBLY
X
3-6-2 Freezer Compartment Lamp
1. Unplug refrigerator power cord form outlet.
2. Remove screw with driver.
3. Grasp the cover Lamp, pull the cover downward.
Figure 10 Figure 11
CAUTION
DO NOT ATTEMPT TO REMOVE THE MULLION :
REFRIGERANT LINES!
Figure 15

3-7 MULTI DUCT 3-9 DISPENSER
1) Disconnect funnel and
button assembly by
pulling down and
forward.
1. Remove the upper and
lower Caps by using a
flat screwdriver, and
remove 2 screws.
(Figure 16)
2. Disconnect the lead wire
on the bottom position.
2) Hold the left and right side
of the “Cover Assembly,
dispenser” as shown in the
picture, and pull and
remove it. The cover
3-8 MAIN PWB nispenser is attached with a
Figure 16
A WARNING: Unplug the refrigerator before removing the
control board.
1) Loosen 3 screws on the PWB cover. A CAUTION : When replacing the dispenser cover in the
i reverse order of removal, be careful that the lead wire
does not come out and the water tube is not pinched by
the dispenser cover, as shown in the picture below.
2) Remove the PWB cover
economy
3-10 DISPLAY PWB REPLACEMENT
1) Pull up and out on the dispenser cover to remove.
3) Disconnect wire harness and replace the main PWB in
the reverse order of removal.
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3-11 FUNNEL REPLACEMENT 3-14 ICE CORNER DOOR REPLACEMENT
1) Pull up and out on the dispenser cover to remove. 1) Loosen the front screw as shown in the picture.
2) Disconnect the wire harness. 2) Lift up the hinge with one hand.
3) Replace in reverse order. 3) Pull out the Ice Corner Door with the other hand.
3-12 SUB PWB FOR WORKING DISPENSER
1) Loosen the screw on the sub PWB.
3-15 ICEMAKER ASSEMBLY
1) Loosen two screws as shown in the first picture.
2) Pull the sub PWB down.
3) Disconnect the wire harness and replace the sub PWB in
the reverse order of removal.
2) Disconnect the wire harness & ground screw replace
thelcemaker assembly in the reverse order of removal.
3-13 DUCT DOOR REPLACEMENT
Pull up and out on the dispenser cover to remove.
Disconnect the wire harness.
Remove the funnel
-10-