WM3997H LG Washer Service Manual MFL67307985
-
Upload
appliance799 -
Category
Documents
-
view
235 -
download
0
Transcript of WM3997H LG Washer Service Manual MFL67307985
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 1/43
WASHING MACHINESERVICE MANUALCAUTION
READ THIS MANUAL CAREFULLY TO DIAGNOSE
PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT.
Website:http://biz.lgservice.com
MODEL :WM3997H*A
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 2/43
!"#$%&'%(85*+,- . /01#2 3'43 /56-789 6- :;58<
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 3/43
!"#$%#$&
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 4/43
!"#$%$&'
!"#$ $"&'# "()*+ $"&',-&.
!"#$$%&'(
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 5/43
3+ "8<7158= > 78?@-6?<# 8A/#<-<76;-
3B4+ "8<7158=
Ultra Capacity
7CD EFGHDG IGJK DLFMEDN L,O PJNO CQHCDG CDFI IG,R FLI NOG,LHDG SDLOGQTJHFE T,GSDUMJO FEN, EDNN OFLHEQLH FLI VGQLWEQLH ,T OCD EFJLIGX+ @DFYQDG E,FINU NJSC FN WQLH NQZD
S,KT,GODGNU MEFLWDONU FLI SJGOFQLNU SFL MD VFNCDI+
Direct Drive System
7CD FIYFLSDI MGJNCEDNN 9? K,O,G IQGDSOEX IGQYDN OCD IGJK VQOC,JO MDEO FLI RJEEDX+
Tilted Drum and Extra Large Door Opening
7QEODI IGJK FLI D[OGF EFGHD ,RDLQLH KFWD QO R,NNQMED O, E,FI FLI JLE,FI SE,OCQLH
K,GD DFNQEX+
Steam Washing
=ODFK VFNCQLH TDFOJGDN JRHGFIDI VFNCQLH RDGT,GKFLSD VQOC E,V DLDGHX FLI VFODG
S,LNJKROQ,L+
RollerJets
\FNCQLH MFEE DLCFLSDN OCD VFNC RDGT,GKFLSD FLI GDIJSDN IFKFHD O, OCD SE,OCQLH+
7CD PDON NRGFX FLI CDER OJKMED SE,OCDN O, DLCFLSD VFNCQLH RDGT,GKFLSD VCQEDKFQLOFQLQLH TFMGQS SFGD+
Automatic Wash Load Detection
<JO,KFOQSFEEX IDODSON OCD E,FI FLI ,ROQKQZDN OCD VFNCQLH OQKD+
Built-in Heater
6LODGLFE CDFODG CDERN O, KFQLOFQL VFODG ODKRDGFOJGD FO QON ,ROQKJK EDYDE T,G NDEDSODI
SXSEDN+
Child Lock
7CD SCQEI E,SW RGDYDLON SCQEIGDL TG,K RGDNNQLH FLX MJOO,L O, SCFLHD OCD NDOOQLHN
IJGQLH ,RDGFOQ,L+
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 6/43
2-2. NEURO FUZZY WASHING TIME OPTIMIZATION
To get the best washing performance, optimal time is determined by the water temperature,
the selected washing temperature, and the size of the load.
2-3. WATER LEVEL CONTROL
This model incorporates a pressure sensor which can sense the water level in the tub.
The water supply is stopped when the water level reaches the preset level, the washing
program then proceeds.
Spinning does not proceed until the water in the tub drains to a certain level.
watertemperature
washing time
rinsing timethe bestwashingperformance
spin rhythm, time
load
size
NEURO-FUZZY
selectedwashing
temperature
SENSING EFFECTPROCESSING DETERMINATION
The door can be opened by pulling the door handle whenever washer is not in operation.
When the cycle is completed, the DOOR LOCKED light will turn off.
If a power failure has occurred while in operation, the door will unlock after 5 minutes.
Clicking sounds can be heard when the door is locked/unlocked.
2-4. DOOR CONTROL
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 7/43
3B]+ 7@8 9;;5 ?<- -;7 ^8 ;/8-89
\CQED RG,HGFK QN ,RDGFOQLH+
\CDL F R,VDG TFQEDI FLI R,VDG REJH QN OFWDL ,JO QL ,RDGFOQ,L+
\CQED 9,,G #,SW EQHCON OJGL ,L+
\CQOD OCD K,O,G QN QL OCD RG,SDNN ,T QLDGOQFE G,OFOQLHU OCG,JHC OCD ,RDGFOQ,L QN RFJNDI+
3B$+ 9;;5 #;?:89 #<!/ #6_@7=
\CDL OCD TGD`JDLSX ,T VFODG EDYDE QN E,VDG OCFL 33+( W@Z+
a6O SFL MD SFLSDEDI VCDL OCD TGD`JDLSX QN K,GD OCFL 3&+b W@Z+c
\CDL OCD ODKRDGFOJGD QLNQID OCD OJM QN CQHCDG OCFL d]e? FLI VFODG EDYDE QN L,O 3]+] W@Z+
a6O SFL MD SFLSDEDI VCDL OCD VFODG EDYDE QN 3]+] W@Z ,G OCD ODKRDGFOJGD QLNQID OCD OJM QN E,VDG OCFL d'e?+c
3B%+ ?@6#9 #;?:
1ND OCQN ,ROQ,L O, RGDYDLO JLVFLODI JND ,T OCD VFNCDG+ /GDNN FLI C,EI =7<6- ?<58 MJOO,L T,G &
NDS,LIN O, E,SW.JLE,SW S,LOG,E+
\CDL SCQEI E,SW QN NDOU ?@6#9 #;?: EQHCON FLI FEE MJOO,LN FGD IQNFMEDI D[SDRO OCD /;\85
MJOO,L+ 2,J SFL E,SW OCD S,LOG,EN ,T OCD VFNCDG VCQED VFNCQLH+
?@6#9 #;?: EFNON FTODG OCD DLI ,T SXSED+ 6T X,J VFLO O, IDFSOQYFOD OCQN TJLSOQ,LU
/GDNN FLI C,EI OCD =7<6- ?<58 MJOO,L T,G & NDS,LIN+
3Bb+ \<785 ?65?1#<76;-\CDL VFNCQLH FLI GQLNQLH TJLSOQ,L ,T NC,VDG FO OCD JRRDG RFGO ,T _FNWDO+
\CDL VFNCQLHU QO S,LOQLJ,JNEX ,RDGFODN T,G & KQLJODN FLI QLODGKQOODLOEX+
\CDL GQLNQLHU QO S,LOQLJ,JNEX ,RDGFODN FTODG S,KREDOQ,L ,T VFODG NJRREX+
3B(+ =78<!
",G O,JHC NOFQLDI SE,OCDNU NQSW G,,K EQLDLNU ,G MFMX SE,OCDN+
=ODFK \FNC QN FYFQEFMED VQOC =FLQOFGXU ^JEW.#FGHDU /DGK+ /GDNNU ?,OO,L.-,GKFEU FLI ^FMX \DFG SXSEDN+
7CQN ,ROQ,L TDFOJGDN JRHGFIDI VFNCQLH RDGT,GKFLSD VQOC E,V DLDGHX FLI VFODG S,LNJKROQ,L+
9, L,O E,FI IDEQSFODN NJSC FN V,,EU NQEWU FLI DFNQEX IQNS,E,GDI SE,OCDN+
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 8/43
!" #$%&' )*+,&)-).$&)/,
!""#$$%&'#$
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 9/43
!
"
#
$%
&
'
()*+,) .),/010234 5.6 78) 19.7+:), ;857 78) 7,+9<=) 0.>
?8)2 02.75==023 +, ,)@50,023 78) ;5.8),4 @97 +2 =+23 3=+/). 52A .5*)7B 3=5..).>
C8)16 78) .)79@ D@+;), .9@@=B 0. !"E FGC4 ,):+/) 78) 7,52.07 <+=7.4 =)/)= 78) ;5.8),4 )71>H
C8)16 ;078 78) 7,+9<=).8++7023 390A)>I=52 B+9, .),/01) :)78+A <B ,)*),,023 7+ 78) A0.5..):<=B 02.7,9170+2.>
J),/01) 78) 9207>
G*7), .),/010234 +@),57) 78) 5@@=0521) 7+ .)) ;8)78), 07 *92170+2. 1+,,)17=B>
JKGLMGNM OLJKGPPGKOQL
K8) 5@@=0521) .8+9=A <) 02.75==)A 5. *+==+;.R
N):+/) 78) $ .80@@023 <+=7.
;078 78) .9@@=0)A ;,)218>
N):+/) 78) =+;), <+07. *0.7>
O7 0. )5.0), 7857 ;5B>
S))@ 78) .80@@023 <+=7. 52A
.@522), *+, *979,) 9.)>
O2.),7 78) $ 15@. D@,+/0A)AH
027+ 78) 8+=)>
K9,2 1=+16;0.) 7+ ,50.)T
1+927),1=+16;0.) 7+ =+;),>
K9,2 78) =)/)=023 *))7 7+
5AU9.7 78) 5@@=0521)>
P+;),
V038),
!"#$%" '(" )(*++*,-
.$/')
*,)'0// '(" 0++/*0,1"
$, 0 2/0' 0,3 2*!# )4!201"
0354)' '("
/"%"/*,-
$> OLJKGPPGKOQL W KXJK
S))@023
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 10/43
!"#$%& ()*( ()" #+,,"# -*.)"# $. $/.$0" 1% ()"
2*32" 41//"4(1#5
6$7)("/ ()" $/3"( )1." ."4+#"3& (1 8#"2"/( 3"*9.5
:/.(*33 ()" $/3"( )1." (1 41##"4( (";8"#*(+#"
-*("# (*85
<()"#-$."= $( 4*+." 0#$8. 1/ ()" 0#*-"# 8*/"3
)*/03" */0 0#*-"# 8*/"35
><? 6< @<AAB@6 6>B :ACB6 ><DB
@<AAB@6 6>B EFG:A ><DB
• H*9" .+#" ()*( ()" )1." $. /1( (-$.("05
@<AAB@6 I<?BF ICJK
6)" "/0 1% ()" 0#*$/ )1." .)1+30 ," 83*4"0 3".. ()*/ LMN %#1; ()" %311#5
• G21$0 .+,;"#7$/7 ()" "/0 1% ()" )1."5
• @1//"4( ()" 81-"# 83+7 (1 ()" -*33 1+(3"(5• G21$0 41//"4($/7 ."2"#*3 "3"4(#$4 0"2$4".=
*. 01$/7 .1 ;*& 4*+." * %$#"5
>1( @130
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 11/43
! "#$" &'#()"*&+
! ',-./,/0123 42,
5/671389
• :233-;0 07- .25-, .<=8 02 07-
2=0<-09
• :233-;0 07- 13<-0 726-69
" ',-66 07- '&>#( ?=00239 # ',-66 07- $")("@')A$#
?=00239
• B160-3 42, / ;<1;C 02 D-0-,E13- 14 07-
D22, 7/6 <2;C-D9
$ :7-;C 07- 5/0-, 7-/0138
4=3;01239
• ',-66 07- >)$F@(*+$# ?=0023
/3D 07- .,-6-30 0-E.-,/0=,- 51<<
?- D16.</G-D9
• :7-;C 14 07- D,=E ,20/0-6
;<2;C516- /3D ;2=30-,;<2;C516-9
% :7-;C 07- /=02E/01; ,-H-,6-
,20/01239& :7-;C 07- 5/0-, 6=..<G9
• :7-;C 14 5/0-, 16 6=..<1-D 07,2=87
07- D-0-,8-30 D16.-36-,9
' :7-;C 07- D,/13 /3D 6.13
4=3;012369
• '25-, 244 /3D 07- .25-, 239
• ',-66 07- $'*+ $'##I ?=00239
• ',-66 07- $")("@')A$# ?=00239
• :7-;C 07- 6.13 /3D D,/13 4=3;012369
• B160-3 42, / ;<1;C 02 D-0-,E13- 14 07-
D22, 16 =3<2;C1389
( ',-66 07- $")("@')A$#
?=00239) >/0-, ,-E2H/<
• *4 $#(J*:# 16 3--D-D D=,138
;7-;CK ,-E2H- 07- ,-E/13138
5/0-, ?G .=<<138 2=0 07- 726- ;/.9
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 12/43
■ "#$$%&'(
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 13/43
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 14/43
ime Delay
RINSE/ SPIN/ TEMP. Button
DRY SELECTOR
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 15/43
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 16/43
%+ 78=7 !;98
"#$% "#&&' "($) )&*&)
+,"-./$%"& '&),0 +,"-
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 17/43
b+ 75;1^#8=@;;76-_
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 18/43
!"#$%&'()&*"+'++!
#;?:89 !;7;5855;5
88/5;! 855;5
f 7CD S,LLDSO,G a&BRQLU KFEDU VCQODc QL OCD !;7;5@<5-8== QN L,O S,LLDSODI O, OCD S,LLDSO,G a&BRQLU
TDKFEDU VCQODc ,T =7<7;5 <==8!^#2+
f 7CD DEDSOGQS S,LOFSO MDOVDDL OCD S,LLDSO,GN a&BRQLU
KFEDU VCQODc QL OCD !;7;5 @<5-8== FLI dBRQLU
TDKFEDU VCQOD S,LLDSO,G QL OCD !<6- /\^
<==8!^#2 QN MFI ,G JLNOFMED+
f 7CD !;7;5 @<5-8== MDOVDDL OCD =7<7;5
<==8!^#2 FLI !<6- /\^ <==8!^#2 QN SJO
a,RDL SQGSJQODIc+
f 7CD CFEE NDLN,G QN ,JO ,T ,GIDG.IDTDSOQYD+
,
f 88/5;! QN ,JO ,T ,GIDG+
9QNREFXDI ,LEX VCDL OCD =7<57./<1=8 MJOO,L QN
TQGNO RGDNNDI QL OCD #,FI 7DNO !,ID+
-
HLQCNFVDEQCVIDRR,ONNQXERRJNGDV,RDCOGDOT<f851#6<"58\;/
KFSCQLD QN V,GWQLHU OCD R,VDG QN NJRREQDI GFRQIEX+
./
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 19/43
!"
#$ &'( $)**+,(- ./+&01( !!"2 345
#$ &'( ./+&01( 6(&7((8 &'( ! 9#:;<= 3>><?@:A
B/88(B&/C$ !!"2 345
#$ &'( :<D EFG /85
3C( &'( B/88(B&/C$ E!G /8 &'( HI@ +//$(5
#$ 7,C( /J &'( D#>H:3A HI@ 3>><?@:A
6C/K(85
=(*+0B( D#>H:3A HI@ 3>><?@:A
/C C(*0,C 7,C(L
4'(BK &'( J)$( /C C($(&
&'( B,CB),& 6C(0K(CL
=(*+0B( &'( 9#:;<=
3>><?@:A E4#=4GL
=(*+0B( ?3#M HI@
3>><?@:AL
=(B/88(B&L
=(*+0B( &'( ?3#M HI@
3>><?@:AL
MN HNI<=
OPQL 93R:; D#3SMN>#> 3MD ;=NR@:<>TNN;#MS
FL @( B0C(J)+ /J (+(B&C,B $'/BK ,J -,$B/88(B&,81 *0C&$ 7',+( &C/)6+($'//&,81L
!L 9,C$& /J 0++U B'(BK &'( B/88(B&,/8 /J (0B' (+(B&C,B0+ &(CV,80+ 7,&' &'( 7,C,81 -,01C0VL
QL #J W/) C(*+0B( &'( ?3#M HI@ 3>><?@:AU C(,8$(C& &'( B/88(B&/C$ B/CC(B&+WL
!"#$%&'
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 20/43
%!
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 21/43
%%
If it still has severe vibration and noise, regulate a specific spin speed that generates excessive vibration and
noise as follows:
1) Put an unbalance part (rubber) inside of the drum.
2) Start the QC test mode (Refer to section 7-2).
3) Press Delay Wash button, then ‘ ’ is displayed.
4) Press the Spin Speed button repeatedly to select Extra High.
5) Press the Quick Cycle button, the spin speed is displayed.
6) Press the Start/Pause button.
7) Press the Beeper button repeatedly to set spin speed (600, 800, 1000, 1200 rpm) and check if there is vibration
and noise.8) If there is no vibration and noise, increase the spin speed by pressing Beeper button.
9) If there is vibration and noise, rotate the Cycle selector knob clockwise to reduce the Spin Speed (reduce by 50
and 100 rpm). In case of 600 rpm, it can not reduce the spin speed.
10) If vibration and noise are reduced, press the Quick Cycle button to store (2 beep sounds).
* If you want to return to factory default spin speed setting, repeat above steps except step 9).
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 22/43!"
!
"#$%&'
!
"()*
#$%&'
()*
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 23/43
! &
)*+,-.-/ 012
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 24/43
HEATING WITHOUT WATER
DRAIN MALFUNCTION
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 25/43
'%($)#* !"#$)#,",&-. (/"0%
$'% &%$$)#* 1($%2 $%34%2($,2%
1(&' '%($%2 $2",/-%
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 26/43
1)-- #"$ !)2!,-($% 1($%2
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 27/43
345
345 3#5
&4)# $2",/-%
!
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 28/43
2$
Replace the thermistor.
6322FR2046C : Dry
Duct
Is the resistance of thermistors on dry duct
2.5k - 180k (at 100 ~ 0
Clean the bellowsDisassemble the cabinet cover andcondensing bellows.
Is there any foreign object in the condensing
bellows.
Disassemble the dry fan assembly and dry
duct upper, and remove foreign objects in
duct and fan.
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 29/43
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 30/43
Be sure to unplug the machine before disassembling and repairing the parts.
CONTROL PANEL
1 Unscrew 2 screws on the back of the top plate.
2 Pull the top plate backward and upward as
shown.
3 Disconnect the Display PWB assembly
connector from the cabling.
4 Pull out the drawer and unscrew 2 screws.
5 Remove one screw.
6 Lift the side the control panel assembly and
pull it out.
7 Unscrew the 8 screws from the control panel
assembly.
8 Disassemble the display PWB assembly.
TOP PLATE ASSEMBLY
CONTROL PANEL ASSEMBLY
DRAWER
CONTROL PANEL ASSEMBLY
DISPLAY PWB ASSEMBLY
". DISASSEMBLY INSTRUCTIONS
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 31/43
MAIN PWB ASSEMBLY
Disconnect the POWER connector and
the pressure switch assembly.
Remove the protective cover.
Unscrew 1 screw on the back.
Remove the main PWB.
Disconnect the connectors.
PROTECT COVER
1
2
3
4
5
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 32/43
((
6
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 33/43
(&
Open the door.
Unscrew the 7 screws from the HINGE COVER.
Put a flat ( - ) screwdriver into the openng of the hinge,and pull out the hinge cover.
Unscrew a screw from the lower side of door.
Disassemble the door upward.
Open the door and disassemble the CLAMP
ASSEMBLY.
Unscrew the 2 screws.
Be careful! The door is heavy.
NOTE
• Reconnect the connector after replacing the
DOOR SWITCH ASSEMBLY.
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 34/43
!"#$%&' !)*&+
!"#$%&' )*& + #$%&'# ,%-. /00&% -, )*&
$123"&) $-4&%5
!"#$%&' )*& #$%&' ,%-. )*& ,36)&% $-4&%5
7/) 1 ,61) 8 9 : #$%&';%34&% -% 0/))< ="3,& 3")- )*
*3">& #6-)# 1) )*& 2-))-. -, )*& $-4&% 1"; 0%<
3) -/)5
!"#$%&' )*& #$%&' ,%-. )*& 6-'&% #3;& -, )*&
$123"&) $-4&%5
?
@
A
B
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 35/43
Open the door.
Disassemble the clamp assembly.
Tilt the cabinet cover.
Disconnect the door switch connector.
Disassemble the clamp assembly.
Disassemble the gasket.
Lift and separate the cabinet cover.
NOTE : When assembling the
cabinet cover, connect the door switch
connector.
5
6
7
8
9
10
11
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 36/43
DOOR
Open the door.
Unscrew the 4 screws from the hinge.
(Use the 8mm tool.)
DOOR LOCK SWITCH ASSEMBLY
Open the door and remove the gasket using
the special gasket pliers.
Unscrew the 2 screws.
Disassemble the door upward.
NOTE
• Reconnect the connector after replacing
the door switch assembly.
1
3
1
2
2
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 37/43
PUMP
Disassemble the cabinet cover.
Separate the pump hose, the bellows, the
circulation hose assembly from the pump
assembly.
Disassemble the pump assembly.
HEATER
Disassemble the cabinet cover.
Separate 2 connectors from the heater.
Loosen the nut and pull out the heater.
THERMISTOR
Disassemble the cabinet cover.
Unplug the white connector from the
thermistor.
Pull it out by holding the bracket of the
thermistor.
CAUTION
• When assembling the heater, insert the
heater into the heater clip on the bottom of
the tub.
• Tighten the fastening nut so the heater is
secure.
CIRCULATIONHOSE
PUMP HOSE
BELLOWS
1
2
3
1
2
3
1
2
3
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 38/43
WHEN FOREIGN OBJECT IS STUCK BETWEEN DRUM AND TUB
Disassemble the cabinet cover.
Separate the heater from the tub.
Remove any foreign objects (wire, coin, etc.)
by inserting a long bar in the opening.
LAMP ASSEMBLY
Unscrew 2 screws on the back of the top plate.
Pull the top plate backward and upward as
shown.
TOP PLATE ASSEMBLY
1
2
3
1
Disconnect the connector.3
Disassemble the lamp assembly.4
2
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 39/43
MOTOR/DAMPER
NOTE
• If you pull the dampers apart, the must be
replaced. If you do not separate them, they
can be re-used.
Bolt
Rotor
DAMPERHINGE,
DAMPER
Disassemble the back cover.
Remove the bolt.
Pull out the rotor.
1
2
3
Unscrew the 2 screws from the tub bracket.
Remove the 6 bolts on the stator.
Unplug the 2 connectors from the stator.
1
2
3
Disassemble the damper hinges from the tub
and base.
1
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 40/43
!"#$
!"%%
!%"#
!%##
!%#%
!&'$
!&$$
!&"#
!"$"
!"%#
!"&#
!"%"
!"$% !%(#
!)#"
!&&#
!&%#
!"##
!"#"
!"#&!"#)
*)"$
*)"#
!&$#
!"""!""#
!"&"
!"$#
!"#%
!))#
!)##
+&"#
!"#,
*""#
!"$&
!"$)
8. -./012-2 45-6
8-1. CABINET & CONTROL PANEL ASSEMBLY 부 분해도
!"7$
!"$,
!"'#!"'"
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 41/43
!"#$!"%$!$&'
!"""
!""'
!"%'
!$#'
!"$"
!&"#
!&"'
($)'
("%'
!%""
!%"'
(%)$
!"$'
!&$'
("%&!$%'
(%)*
!"$&
($)&
!)""
!)"'!$)'
!""&
!"%"
!""+
8-. RM & TB ASSEMBLY ,-./01,1 34,5
!&+"
!&+#
!&+'
($"&
(%)&
!"#&
(%)%
(%)%
($"'
!"#"
!"##
!&&'
!&%'
(%)"
!&#'
!"'&
!"6'
!&")
!$%)
!$%*
!$%%
!$%+
!$%6
!$%&
!$%#
!$)"
!&"$
!&""
!"%#
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 42/43
!"##
!"$%
!&'$
!$$(
!)"#
!)$#
!&&)
!&"#
!$$#
!$$'
!"$$!"$"
!"$)
!)*#
!"#$% '(#)$ *+#%$, -'.
!"#$ &'#()* +", &"-./0)*
8-. ISPENSER ASSEMBLY +,-./0+0 23+4
!)%#
!)'#
!&"$
!$$%
!"&#
!"$5
7/25/2019 WM3997H LG Washer Service Manual MFL67307985
http://slidepdf.com/reader/full/wm3997h-lg-washer-service-manual-mfl67307985 43/43
!""#
!"""
!$"%
!"##
!"&#
!&"$
!&"#
'&""
'&""
!$&#
!$$#
!"#"
!$(#
!$"#
!&""
!"$#
!"$"
!$&%
8- !"#$%&!& ()!*