LG DFC425 Series User manual

OWNER'S MANUAL
DISHWASHER
Before beginning installation, read these instructions
carefully. This will simplify installation and ensure that the
product is installed correctly and safely. Leave these
instructions near the product after installation for future
reference.
ENGLISH
DFC425**
MFL71916171
Rev.01_062023
www.lg.com
Copyright © 2023 LG Electronics Inc. All Rights Reserved.

TABLE OF CONTENTS
This manual may contain images or
content that may be different from the
model you purchased.
This manual is subject to revision by the
manufacturer.
SAFETY INSTRUCTIONS
READ ALL INSTRUCTIONS BEFORE USE...........................................................4
WARNING............................................................................................................4
CAUTION .............................................................................................................9
INSTALLATION
Parts and Specifications ..................................................................................11
Preparing Cabinet Opening............................................................................13
Levelling the Appliance ...................................................................................16
Installing the Drain Hose ................................................................................17
Preparing Water and Electrical Connections................................................18
Final Installation Check ...................................................................................19
OPERATION
Operation Overview.........................................................................................21
Before Using .....................................................................................................22
Control Panel ....................................................................................................26
Wash Cycles ......................................................................................................27
Options and Extra Functions ..........................................................................28
Programme Table ............................................................................................31
Information for Test ........................................................................................33
Loading the Dishwasher .................................................................................34
Adding Cleaning Agents..................................................................................40
Refilling..............................................................................................................41
Useful Tips.........................................................................................................41
SMART FUNCTIONS
LG ThinQ Application.......................................................................................43
Smart Diagnosis ...............................................................................................45
MAINTENANCE
Cleaning and Caring ........................................................................................47

TROUBLESHOOTING
Before Calling for Service................................................................................51

4
SAFETY INSTRUCTIONS
SAFETY INSTRUCTIONS
READ ALL INSTRUCTIONS BEFORE USE
The following safety guidelines are intended to prevent unforeseen
risks or damage from unsafe or incorrect operation of the appliance.
The guidelines are separated into ‘WARNING’ and ‘CAUTION’ as
described below.
Safety Messages
WARNING
WARNING
• To reduce the risk of explosion, fire, death, electric shock, injury or
scalding to persons when using this product, follow basic
precautions, including the following:
Technical Safety
• This appliance is not intended for use by persons (including children)
with reduced physical, sensory or mental capabilities, or lack of
experience and knowledge, unless they have been given supervision
This symbol is displayed to indicate matters and operations that
can cause risk.
Read the part with this symbol carefully and follow the
instructions in order to avoid risk.
WARNING
This indicates that the failure to follow the instructions can cause
serious injury or death.
CAUTION
This indicates that the failure to follow the instructions can cause
minor injury or damage to the product.

5
SAFETY INSTRUCTIONS
ENGLISH
or instruction concerning use of the appliance by a person
responsible for their safety. Children should be supervised to ensure
that they do not play with the appliance.
• Observe the information given in Specifications regarding the
maximum number of place settings to be washed of the dishwasher.
• The water pressure must be between 0.05 MPa and 1.0 MPa.
Installation
• Never attempt to operate the appliance if it is damaged,
malfunctioning, partially disassembled, or has missing or broken
parts, including a damaged cord or plug.
• If the power cord is damaged or the hole of the socket outlet is loose,
do not use the power cord and contact an authorized service centre.
• Do not modify the power cord provided with the appliance. Please
contact the LG Customer information centre to advise of its
incompatibility.
• This appliance should only be transported by two or more people
holding the appliance securely.
• Do not install the appliance in a damp and dusty place. Do not install
or store the appliance in any outdoor area, or any area that is subject
to weathering conditions such as direct sunlight, wind, or rain or
temperatures below freezing.
• Do not plug multiple socket outlets, an extension power cable or
adapter with this appliance.
• Disconnect the power cord, house fuse or circuit breaker before
installing or servicing the appliance.
• When moving or installing the product in a different location, call
qualified service personnel for installation and service.
• Fix the drain hose securely in place.
• This appliance is not designed for maritime use or for mobile
installations such as in RVs, trailers, or aircraft.
• This appliance must be positioned near to an electrical power supply.

6
SAFETY INSTRUCTIONS
• When installing or moving the appliance, be careful not to pinch,
crush, or damage the power cord.
• Use new hose or hose-set supplied with the appliance. Reusing old
hoses can cause a water leak and subsequent property damage.
• Improper connection of the equipment-grounding conductor can
result in risk of electric shock. Check with a qualified electrician or
service personnel if you are in doubt as to whether the appliance is
properly grounded.
• This appliance must be grounded. In the event of malfunction or
breakdown, grounding will reduce the risk of electric shock by
providing a path of least resistance for electric current.
• This appliance is equipped with a power cord having an equipment-
grounding conductor and a grounding power plug. The power plug
must be plugged into an appropriate socket outlet that is installed
and grounded in accordance with all local codes and ordinances.
• After installing, check the hose connection for leaks before moving
the appliance into the cabinet opening.
• Do not damage or place heavy items on the power cord of the
appliance.
• This appliance is intended to be used in household and domestic
applications only and must not be used for commercial purposes.
• For a permanently connected dishwasher: This appliance must be
connected to a grounded metal, permanent wiring system, or an
equipment-grounding conductor must be run with the circuit
conductors and connected to the equipment-grounding terminal or
lead to the appliance.
• Connect the ground wire to the green ground connector in the
terminal box.
Operation
• Immediately unplug the power plug and contact an LG Electronics
customer information centre if you detect a strange sound, odour, or
smoke coming from the appliance.

7
SAFETY INSTRUCTIONS
ENGLISH
• Do not repair or replace any part of the appliance. All repairs and
servicing must be performed by qualified service personnel unless
specifically recommended in this Owner’s Manual. Use only
authorized factory parts.
• Do not leave the appliance door open. Children may hang on the door
or crawl inside the appliance, causing damage or injury.
• Do not use flammable gas and combustible substances (benzene,
gasoline, thinner, petroleum, alcohol, etc.) near the appliance.
• Do not attempt to separate any panels or disassemble the appliance.
Do not apply any sharp objects to the control panel in order to
operate the appliance.
• Do not bend the power cable excessively or place a heavy object on it.
• Do not put animals, such as pets into the appliance.
• Do not touch the power plug or the appliance controls with wet
hands.
• If there is a gas leakage (isobutane, propane, natural gas, etc.), do not
touch the appliance or power plug and ventilate the area
immediately.
• In case of flood, disconnect the power plug and contact the LG
Electronics Customer Information Centre.
• Under certain conditions, hydrogen gas may be produced in a hot-
water system that has not been used for two weeks or more.
HYDROGEN GAS IS EXPLOSIVE. If the hot-water system has not been
used for such a period, before using the appliance turn on all hot
water tap and let the water flow from each for several minutes. This
will release any accumulated hydrogen gas. As the gas is flammable,
do not smoke or use an open flame during this time.
• Keep the area underneath and around your appliances free of
combustible materials such as lint, paper, rags, chemicals, etc.
• Some dishwasher detergents are strongly alkaline. They can be
extremely dangerous if swallowed. Avoid contact with the skin and
eyes and keep children away from the dishwasher when the door is
open. Check that the detergent receptacle is empty after completion
of the wash cycle.

8
SAFETY INSTRUCTIONS
• Do not operate the appliance unless all enclosure panels are properly
in place.
• Use only detergents or wetting agents recommended for use in a
appliance and keep them out of the reach of children.
• Do not wash and dry articles that have been soaked in explosive
substances such as gasoline, solvents, solvent-based detergent.
• When loading items to be washed:
- Locate sharp items so that they are not likely to damage the door
seal.
- Load sharp knives with the handles up to reduce the risk of cut-type
injuries.
• Do not wash plastic items unless they are marked “dishwasher safe”
or the equivalent. For plastic items not so marked, check the
manufacturer’s recommendations.
• Do not touch any heating element (where it is exposed) during or
immediately after use.
• Do not abuse, sit on, or stand on the door or dish rack of the
dishwasher.
• After cleaning the dishes, turn off the tap. Turn on the tap again and
check the connection status of water supply hose before cleaning.
• Do not open the door while the appliance is in operation. Water will
splash out and could cause a slipping hazard.
• Be careful not to catch your hand when closing the door of the
appliance.
• Do not come into contact with any fitted steam outlet.
• Small parts, such as rack clips and filter retaining posts can be a choke
hazard to small children if removed from the dishwasher. Keep out of
reach of small children.
• Knives and other utensils with sharp points must be loaded in the
basket with their points down or placed in a horizontal position.
• The door should not be left in the open position since this could
present a tripping hazard.

9
SAFETY INSTRUCTIONS
ENGLISH
Maintenance
• Never unplug the appliance by pulling on the power cable. Always
grip the power plug firmly and pull straight out from the socket
outlet.
• Securely plug the power plug in the socket outlet after completely
removing any moisture and dust.
• Do not spray water inside or outside the appliance to clean it.
• Disconnect the appliance from the power supply before cleaning the
appliance. Setting the controls to the OFF or stand by position does
not disconnect this appliance from the power supply.
Disposal
• Before discarding an old appliance, unplug it. Cut off the cable
directly behind the appliance to prevent misuse.
• Dispose of all packaging materials (such as plastic bags and
styrofoam) away from children. The packaging materials can cause
suffocation.
• Remove the door before disposing of or discarding this appliance to
avoid the danger of children or small animals getting trapped inside.
CAUTION
CAUTION
• To reduce the risk of fire, electric shock, or injury to persons when
using your product, basic safety precautions should be followed,
including the following:
Installation
• Install the product on a firm and level floor.
• Do not put the drain hose under the dishwasher during installation.

10
SAFETY INSTRUCTIONS
Operation
• Turn off the water tap and unplug the appliance if the appliance is to
be left for an extended period of time, such as during vacations.
• Do not place objects on the top of the appliance.
• Do not wipe or coat the surface of the product with liquid detergent
or bleach (chlorine bleach, oxygen bleach, etc). Failure to follow these
instructions may result in corrosion or discoloration of the coating.
• Do not touch water draining from the machine as it may be hot.
• If the drain hose and the water supply hose are frozen in winter,
defrost before using.
• Do not put hands, feet, or metal objects below or behind the
appliance.
• Do not wash dishes stained with chemical products such as oil, cream
or lotions used in a massage parlor, skin care shop, beauty shop or
barber shop.
Maintenance
• If cooking oil is spilled on the exterior of the product, wipe it off
immediately. Do not clean the exterior of the product with cleaners
which contain alcohol, thinners, bleach, benzene, flammable liquids,
or abrasives. These substances may discolor or damage the
appliance.

11
INSTALLATION
ENGLISH
INSTALLATION
Parts and Specifications
NOTE
• Appearance and specifications may change without notice to improve the quality of the appliance.
Front View
a Control Panel & Door Handle
b Front Cover
c Lower Cover
d Levelling Feet
e Power Cord
f Water Supply Hose
g Drain Hose
Interior View
a Top Wash Impeller
b Upper Spray Arm
c Lower Spray Arm
d Salt Container Cap
e Filtration System
f Cutlery Basket
*1
g Detergent and Rinse Aid Dispenser
h Steam Nozzle
*1
i Lower Rack
j Upper Rack
k Cutlery Rack
*1
*1 This feature is only available on some models.

12
INSTALLATION
Accessories
a Funnel
b Noise Strip
*1
c Cover Felt
*2
d Moisture Barrier Tape (Aluminum tape)
*2
*1 Noise strips are provided: Lower - 1 EA, Front - 1
EA, Side - 2 EA
*2 This feature is only available on some models.
Specifications
Model DFC425**
Power Supply 220 - 240 V~, 50 Hz
Dimension
(Width X Height X Depth)
600 mm X 850 mm X 600 mm
Product Weight Approx. 49 kg
Max. Capacity 14 Place Settings
Permissible Inlet Water Pressure 0.05 - 1.0 MPa
Power Consumption 1600 - 1800 W

13
INSTALLATION
ENGLISH
Preparing Cabinet Opening
Choosing the Proper Location
• Install the appliance on a flat and stable area
floor.
• Cut out for hoses and electrical cables on either
side. (Approximately 100 mm X 75 mm)
• Select a location as close to the sink as possible
for ease of connection to the water and drain
pipes.
• To ensure drainage, the appliance should not be
installed more than 1 metre away from the sink.
• If the appliance is installed in a corner, allow
minimum clearance of at least 50 mm between
the appliance and an adjacent cabinet or wall.
• Before sliding the appliance into the installation
opening, all necessary height adjustments
should be made using a spanner.
CAUTION
• Any bare wood surrounding the appliance
should be sealed with a waterproof paint or
sealant to prevent it from swelling.
• Slide the dishwasher into the cabinet, opening
carefully. Make sure that the drain hose behind
the machine and inside the cabinet is not kinked
or stretched.
• Install the appliance on a flat and stable area. Do
not place any objects in-between the floor and
base or leg off the appliance.
NOTE
• This installation must be conducted by qualified
service personnel to ensure it has been installed
correctly.
• Do not pull or lift the appliance using the handle;
dosing so can damage the door and hinges.
Open the door and grab the body frame and the
top front opening of the tub to move or lift the
appliance.
• Do not push the door of the dishwasher with
knees.
Attaching the Strip to the
Appliance Base
To reduce noise attach the strip to the appliance
base.
≥600 mm
820 - 880 mm
100 mm
600 - 605 mm
75 mm

14
INSTALLATION
1 Lay down the appliance and pull on both the
hooks at the bottom of the lower cover.
2 Pull on the lower cover to remove it.
3 Remove the double-sided tape on the back of
the felt and attach it to the front side of the
appliance’s bottom.
4 Remove the double-sided tape from the lower
and front strips.
5 Attach the black coloured lower strip a to the
bottom of the lower cover.
6 Attach the black coloured front strip b to the
top of the lower cover.
• The length of the front strip is longer than
the lower cover. Attach the front strip so that
the overhang is equal on both sides of the
lower cover.
7 Attach the lower cover with the strip onto the
appliance.

15
INSTALLATION
ENGLISH
Attaching the Strip to the
Appliance Side Cabinet
To reduce noise attach the strip to the appliance
sides, if the opening space allows.
1 Remove the double-side tape from the side
strips.
2 Attach the side strip to the front of the side
cabinet and then push down the side strip so
that the side strip adheres well to the cabinet.
3 Repeat the above steps for attaching the
opposite side strip to the opposite side cabinet.
Removing the Top Cover
If the height of the opening is below 850 mm,
follow these instructions.
1 Remove the 2 screws on the back.
2 Pull the top cover backwards after removing
the two screws and then lift it up to remove it.
3 Remove the locating pins on the top by using a
Phillips screw driver.
NOTE
• When the appliance is correctly leveled, there
should be no slant, stickiness or rubbing sound
when the door is opened.
Installing Moisture Barrier Tape
When the appliance is installed without the top
cover, the counter top underside may be damaged
by steam or condensation when the door is
opened.
$$Ȇ

16
INSTALLATION
• Install the moisture barrier tape to the underside
of counter top to protect the counter top from
condensation when the appliance opened.
1 Clean and dry the underside of the counter top
on which the tape will be attached.
2 Remove the protective film from the tape.
3 Install the tape to the underside of the counter
top.
NOTE
• Moisture barrier tape is included in the manual
assembly bag.
• If the counter top is made of granite or
waterproof materials, the moisture barrier tape
is not required.
• Condensation may occur on the underside or
along the front edge of the counter top when the
room temperature is low.
Levelling the Appliance
Checking the Level
Levelling the appliance prevents unnecessary
leakage and poor washing. Check whether the
appliance is perfectly level after installation.
• If the appliance rocks when pushing the top
plate of the appliance diagonally, adjust the feet
again.
NOTE
• The appliance is not level if there is a rubbing
sound or stickiness when the door is opened.
Adjusting and Leveling the
Appliance
When the appliance is not perfectly level, turn the
adjustable feet until the appliance no longer
wobbles.
• Turn the adjustable feet clockwise to raise or
turn the adjustable feet counterclockwise to
lower from front-to-back, side-to-side and
corner-to-corner.
NOTE
• Place the appliance on a solid, level floor.
• Do not install the appliance on an elevated
surface.
Case 1. The Door is Slanted to the
Right
1 Unscrew (counter-clockwise) the rear left leg
and correct the level.

17
INSTALLATION
ENGLISH
2 Check the opening of door and repeat if
necessary until the door opens and closes
properly.
Case 2. The Door is Slanted to the
Left
1 Unscrew (counter-clockwise) the rear right leg
and correct the level.
2 Check the opening of door and repeat if
necessary until the door opens and closes
properly.
Installing the Drain Hose
If the end of the drain hose does not fit to the drain
line, use a drain extension kit (optional) that is
resistant to heat and detergent.
• This should be available from a plumbing shop
or a hardware store.
Connection to the Waste Spigot
Check the waste spigot when initially installing. An
OE error can occur when the waste spigot below
the sink is not drilled out properly. To connect the
drain hose, drill out at least a 15 mm diameter hole
in the waste spigot before connecting and
securing.
CAUTION
• Make sure that plastic debris is not remaining
inside of spigot after it has been drilled out.
• Do not attempt to open the waste hole with a
screwdriver and hammer. This will induce debris
to become stuck and cause a malfunction.
• Caution should be taken when passing hoses
through Cabinetry holes as they may have sharp
edges and could damage the hoses. Smooth or
sand edges to avoid damaging the drain or inlet
hose.
• Make sure that the line is not kinked or sharply
bent.
• Make sure the drain hose is straight before
feeding the end of it through the hole for the
water supply.
To prevent siphoning, one of the following
methods must be used.

18
INSTALLATION
Method 1
When the drain hose is connected to a waste
spigot, the hose must be looped up to the
underside of the bench top and secured.
Method 2
When the drain hose is connected to a separate
standpipe
a , it is essential that an airtight
connection
b be made. If not, it can induce odours.
• Standpipe diameter is at least 40 mm.
Preparing Water and
Electrical Connections
Connecting the Hose to the
Water Tap
Connect the water supply hose a to the water tap.
WARNING
• Do not shorten or damage the water supply hose
as it contains electrical wires and components. It
can not be detached or removed from the
appliance for installation purposes.
• It is important that the water supply hose not be
tampered with, cut, disassembled, pulled, or
kinked. It contains electrical wiring inside and if
damaged, can cause an electrical hazard.
CAUTION
• Only use the threaded nut of the water supply
hose to tighten it to the tap.
• Do not twist or kink the water supply hose when
connecting it to the tap.
• This appliance may be fed with either hot or cold
water. If the water connection can not be
maintained below 65ºC, the appliance must be
connected to cold water.
≥ 300 mm
700 – 1000 mm
700 – 1000 mm
≥ 300 mm

19
INSTALLATION
ENGLISH
• Use sealant tape or sealing compound on the
tap’s thread to avoid water leaks.
• Make sure that the line is not kinked or sharply
bent.
NOTE
• Before connecting the water supply hose to the
tap, turn on the tap to flush out foreign
substances (dirt, sand or sawdust) in the water
lines. Let water drain into a bucket.
• It takes about 3 – 4 minutes for the first supply
water.
Routing Electrical Wiring
Connect the appliance to an earthed socket in
accordance with the current wiring regulations,
protected by a minimum 15 amp circuit breaker or
time delay fuse.
Wiring must be two wires with earth.
The power cord should not be positioned behind
the appliance but within 1.2 meters of the side so
that the plug is easily accessible.
WARNING
• For personal safety, remove house fuse or open
circuit breaker or switch off power plug before
installation.
• Do not use an extension cord or double adapter.
• The plug must be plugged into an appropriate
outlet that is properly installed and grounded in
accordance with all local codes and ordinances.
• Repairs to the appliance must only be carried out
by qualified service personnel. Repairs carried
out by inexperienced persons may cause injury
or serious malfunctioning. Contact our local
service centre.
• Connect to a properly rated, protected, and sized
power circuit to avoid electrical overload.
Final Installation Check
Testing the Dishwasher
1 Turn on electrical power.
2 Turn on house water supply.
3 The door should open and close smoothly and
without harsh noises, if the unit has been
levelled correctly.
4 Run the appliance on a Rinse cycle to verify
proper operation and check for leaks.
Installation Check Error Codes
Error
Code Possible Cause and Solution
OE
Drain hose kinked or pinched.
• Feed the drainage and supply
hoses through the hole under
the sink. Then gradually slide the
dishwasher into the cabinet
while pulling on the hoses under
the sink to take up any slack. This
helps avoid kinking the hoses or
trapping them beneath the
dishwasher.
Waste spigot under sink is
clogged.
• Drill out the waste spigot under
the sink.

20
INSTALLATION
IE
Water supply line kinked under
dishwasher.
• Feed the drainage and supply
hoses through the hole under
the sink. Then gradually slide the
dishwasher into the cabinet
while pulling on the hoses under
the sink to take up any slack. This
helps avoid kinking the hoses or
trapping them beneath the
dishwasher.
House water supply not turned
on.
• Turn water on. Water pressure
may be too high or too low.
Error
Code Possible Cause and Solution