Kärcher K1800PS User manual

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K1800PS
1.106-201.0
Operator Manual
Electric Pressure Washer . . . . . . . . . 4
Manuel D'utilisation
Laveuse à pression électrique . . . . 21
Manual De Usuario
Hidrolavadora de alta presion . . . . . 38
9.808-307.0-B 02/22

1. Water Inlet
2. High Pressure Outlet
3. Hose Connector
4. ON/Off Pedal
5. Power Cord Cleat
6. Nozzles
7. Turbo Nozzle
8. High Pressure Hose
9. Spray Wand
10. Spray Gun
11. Handle
12. Plug Storage
13. Wheel
14. Detergent Tank
15. Power Cord
Machine Parts List

13
21
34
10
9
8
12
76
11
5
14
15

4 English
Customer Service . . . . . . . . . . . . . . . 4
Safety Instructions . . . . . . . . . . . . . . . 5
Hazard Levels . . . . . . . . . . . . . . . . . . 5
Assembly Instructions . . . . . . . . . . . . 8
Intended Use . . . . . . . . . . . . . . . . . . . 8
Initial Start-Up . . . . . . . . . . . . . . . . . . 9
Using the Accessories . . . . . . . . . . . . 11
Working with Detergents . . . . . . . . . . 11
Taking a Break. . . . . . . . . . . . . . . . . . 13
Shutting Down &
Cleaning Up. . . . . . . . . . . . . . . . . . . . 14
Winterizing & Long Term Storage . . . 15
Maintenance Instructions. . . . . . . . . . 15
Cleaning Tips. . . . . . . . . . . . . . . . . . . 16
Optional Accessories. . . . . . . . . . . . . 17
Troubleshooting. . . . . . . . . . . . . . . . . 18
READ AND COMPLY WITH ALL
INSTRUCTIONS BEFORE USING
THIS MACHINE.
SAVE THESE INSTRUCTIONS
Your device must be registered in
order to help with any questions or
issues that you have. You can register
your device at www.karcher-
register.com if located in the U.S.A.,
www.karcher.com/ca if located in
Canada, or www.karcher.com/mx if
located in Mexico.
In the case of a warranty claim, you
can contact customer support. Please
see the contact information listed
below for either the USA, Canada, or
Mexico. You MUST provide your proof
of purchase in order to file a warranty
claim either via email, phone, or fax.
You can contact our Customer Service
department by phone at 1-800-537-
4129 or via the website at
www.karcher.com/us.
You can contact our Customer Service
department by phone at 1-800-465-
4980 or via the website at
www.karcher.com/ca.
K1800PS Pressure Washer
Contents
Specifications
K1800PS Series
Operating Pressure 1800psi
Max Water Volume 1.2GPM
Amp Draw 13 Amps
Voltage 120V
Phase 1
Frequency 60 Hz
Model Number 1.106-201.0
Serial Number
Customer Service
Registration
Warranty
USA Customer Service
Canada Customer
Service

English 5
Indicates “an imminently hazardous
situation which, if not avoided, will
result in death or serious injury.”
Indicates “a potentially hazardous
situation which, if not avoided, could
result in death or injury.”
Indicates “a potentially hazardous
situation which, if not avoided, may
result in minor or moderate injury or in
property damage incidents.”
When using this product basic
precautions should always be
followed, including the following:
●Read all the instructions before using
the product.
●To reduce the risk of injury, close
supervision is necessary when a
product is used near children.
●Know how to stop the product and
bleed pressures quickly. Be
thoroughly familiar with the controls.
●Stay alert - watch what you are doing.
●Do not operate the product when
fatigued or under the influence of
alcohol or drugs.
●Keep operating area clear of all
persons.
●Do not overreach or stand on
unstable support. Keep good footing
and balance at all times.
●Follow the maintenance instructions
specified in the manual.
●This product is provided with a
Ground Fault Circuit Interrupter built
into the power cord plug. If replace-
ment of the plug or cord is needed,
use only identical replacement parts.
Risk of Injection or Injury – Do Not
Direct Discharge Stream At
Persons.
●High-pressure jets can be dangerous
if misused. The jet must not be
directed at persons, animals,
electrical devices, or the unit itself.
●Wear safety goggles and ear
protection.
Risk Of Fire/Explosion – Do not
spray flammable liquids.
●Do not use acids, alkaline, solvents,
or any flammable material in this
product. These products can cause
physical injuries to the operator and
irreversible damage to the machine.
Risk of Electrocution.
●Inspect cord before using - Do not
use if cord is damaged.
●Keep all connections dry and off the
ground.
●Do not touch plug with wet hands.
Safety Instructions
Hazard Levels
Important Safety
Instructions

6 English
●Do not use extension cord with this
product.
●Connect to individual branch circuit
only.
Risk of Eye Injury
●Spray can splash back or propel
objects. Always wear properly rated
eye protection such as goggles or
face shield while spraying. (Safety
glasses do not provide full protection)
This unit has been designed for use
with cleaning detergents
recommended by the manufacturer.
The use of other cleaning deter-
gents may affect the operation of
the machine and void the warranty.
Gun kicks back – Hold with both
hands.
●The trigger gun safety lock prevents
the trigger from accidentally being
engaged. This safety feature must
be engaged when replacing nozzles
or not in use.
●This safety feature DOES NOT lock
spray in the ON position.
●Do not spray electrical connections,
electrical outlets or fixtures.
●Do not use with flammable liquids
and toxic chemicals.
●High-pressure. Keep clear of nozzle.
●Injection hazard: Equipment can
cause serious injury if the spray
penetrates the skin. Do not point the
gun at anyone or any part of the
body. In case of penetration seek
medical aid immediately.
●This system is capable of producing
1800 psi. To avoid rupture and injury,
do not operate this pump with
components rated less than 1800 psi
working pressure (including but not
limited to spray guns, hose and hose
connections).
●Before servicing, cleaning or
removing any parts, shut off power
and relieve pressure.
●If connection is made to a potable
water system, the system shall be
protected against back flow.

English 7
When connecting the water inlet to
the water supply mains, local
regulations of your water company
must be observed. In some areas
the unit must not be connected
directly to the public drinking water
supply. This is to ensure that there
is no feedback of chemicals into
the water supply. Direct connection
via a receiver tank or backflow
preventer, for example,
is permitted.
Use a water filter to avoid potential
damage from dirt in the water
supply such as Karcher part
number 4.730-059.0 from
www.kaercher.com.
●Garden hose must be at least
5/8 inch (16 mm) in diameter.
●Flow rate of water supply must not
fall below 2 GPM/gallons per minute
(7.6 L/min).
●Flow rate can be determined by
running the water for one minute into
an empty 5-gallon (18.9 liter)
container.
●The water supply temperature must
not exceed 104°F/40°C.
●Never use the pressure washer to
draw in water contaminated with
solvents,
e.g. paint thinners, gasoline, oil, etc.
●Always prevent debris from being
drawn into the unit by using a clean
water source.
This electric pressure washer is
equipped with a Ground Fault Circuit
Interrupter (GFCI) built into the plug of
the power cord for your protection.
The Consumer Product Safety Com-
mission recommends that you test all
GFCI's once a month. Since the fre-
quency of pressure washer use var-
ies, we recommend that you test the
GFCI as part of your startup proce-
dure each time you use your pressure
washer. It might need to be reset
before working with the pressure
washer. To learn how to perform the
GFCI test and how to reset it, visit
http://www.karcher-help.com and
search for GFCI for further instruc-
tions. DO NOT USE IF GFCI FAILS
TEST.
NOTE: The actual appearance of the
GFCI may be different from this illustra-
tion.
Water Supply
(Cold Water Only) Ground Fault Circuit
Interrupter Protection

8 English
This high pressure washer (hereinaf-
ter referred to as “device”) is designed
for domestic use only.
●For cleaning machines, vehicles,
buildings, tools, facades, terraces,
gardening tools, etc. By means of a
high-pressure water jet (if necessary,
with additional cleaning agents).
●With accessories, replacement parts
and cleaning agents approved by
KÄRCHER. Please observe the in-
formation accompanying the clean-
ing-agents.
The owner and/or user must have an
understanding of the manufacturer’s
operating instructions and warnings
before using this device.
Warning information should be
emphasized and understood.
If the operator is not fluent in English,
the manufacturer’s instructions and
warnings shall be read to and dis-
cussed with the operator in the opera-
tor’s native language by the
purchaser/owner, making sure that the
operator comprehends its
contents.Owner and/or user must
study and maintain for future
reference the manufacturer’s
instructions.
1. Insert wheels into the body of the
machine. Secure with axle pin.
2. Push the handle into place.
3. Install the hose connector to the
water inlet.
Intended Use
Owner/User
Responsibility
Assembly Instructions

English 9
4. Attach nozzles to handle.
5. Thread one end of the high pressure
hose tightly onto the high pressure
outlet on the unit.
6. Thread the other end of the high
pressure hose onto the spray gun
inlet.
1. Thread the garden hose onto the
water inlet connector and hand
tighten.
2. Connect the garden hose to the cold
water source and turn the water
completely on.
3. Attach the spray wand to the spray
gun by pressing the gun into the
wand and hand tightening the thread-
ing of the gun onto the wand.
Initial Start-Up

10 English
4. Pull the lever on the trigger gun to
make sure that water is flowing freely
and that all air has been purged from
the device.
NOTE: We recommend that you test
the GFCI as part of your startup
procedure each time you use the
device, see chapter GFCI
INSTRUCTIONS.
Do not use if GFCI fails test.
1. Plug the Ground Fault Circuit Inter-
rupter (GFCI) into a working outlet.
2. Press “TEST”, then press “RESET” to
assure proper connection.
NOTE: The actual appearance of the
GFCI may be different from this illustra-
tion.
ATTENTION
Pump running dry will cause
damage to the device.
If pressure does not build up in the
device after 2 minutes then switch the
device off and proceed according to
the instruction in chapter,
Troubleshooting guide.
NOTE: Maintain a spraying distance
of at least 12 inches (30 cm) when
cleaning painted surface. Do not get
closer than 24 inches (60 cm) (0r 2
feet) when washing a vehicle.
1. Install the nozzle with the quick
connect on the end of the wand by
pulling the collar back, inserting the
soap nozzle, then pushing the collar
back. Check to make sure that
Nozzle is secure.
2. Turn on the machine by stepping
down on the foot pedal.
The motor starts when the trigger
GFCI Instructions
Operation Instructions
12
High Pressure Operation

English 11
of the gun is pulled and shuts off
when the trigger is released.
3. Unlock the Spray Gun safety lock.
Switch on the device by pulling on the
lever of the trigger gun.
4. Switch off the device by releasing the
lever of the trigger gun. High
pressure remains in the device.
To avoid serious injury, never point
spray nozzle at yourself, other
persons or animals.
Always test an inconspicuous area
before cleaning with high pressure.
Each of the nozzles has a different
spray pattern. Before starting any
cleaning job, determine the best
nozzle for the job.
The Turbo Nozzle
rotates in a zero
degree spray pattern
in a circular motion to
break down tough dirt
and grime. The spray
pattern can cover an area of 4 to 8
inches (10 to 20 cm), depending on
the distance between the tip and the
surface being cleaned.
The 15° Nozzle is
optimized for
concentrated
cleaning power and
time. Use to remove
paint, stains, mildew,
oil, compacted dirt and grime from
decks, siding, driveways and patios.
The Soap Nozzle is
used to apply cleaning
solution to any
surface. Use to
provide a thorough
cleaning to all
surfaces.
For best results see Cleaning Tips for
specific information on how to clean
different surfaces.
Always Use Kärcher Detergent for
Best Results. Kärcher biodegradable
detergents are specially formulated to
Using the Accessories
Using the Nozzles
Working with Detergents

12 English
protect the environment and your
pressure washer. The special formula
won’t clog the suction tube and will
protect the internal parts of the
pressure washer for a longer life.
For Kärcher detergents, check your
retailer or visit our website:
www.Karcher.com/us
Never Use:
●Bleach, chlorine products and other
corrosive chemicals
●Liquids containing solvents (i.e., paint
thinners, gasoline, oils)
●Tri-sodium phosphate products
●Ammonia products
●Acid-based products
These chemicals will harm the unit
and will damage the surface being
cleaned.
Use of these items will void the
warranty.
Detergents can only be applied at low
pressure.
1. Install the soap nozzle into the quick
connect on the end of the wand by
pulling the collar back, inserting the
soap nozzle, then pushing the collar
back. Check to make sure that
Nozzle is secure.

English 13
2. Fill the soap tank with Kärcher
detergent.
3. Turn on the pressure washer by step-
ping on the foot pedal. Pull trigger to
operate unit. Liquid detergent is
drawn into the unit and mixed with
water. Apply detergent to work area.
Do not allow detergent to dry on sur-
face.
4. To rinse, replace the soap nozzle with
the 15° nozzle and pull trigger to
operate.
5. Cleaning Up: Always run fresh water
through the detergent tank when
done to flush any remaining deter-
gents from the injection system.
1. Release trigger and engage gun
safety lock.
2. Turn pressure washer OFF by
stepping on the foot pedal.
Taking a Break
five minutes or more

14 English
1. Turn the machine off by stepping on
the foot pedal and unplug the cord
from the outlet.
2. Turn off the water source.
3. Press trigger to release water
pressure.
4. Release trigger and engage the gun
safety lock.
5. Disconnect the garden hose from the
water inlet on the machine.
6. Unthread and disconnect the high
pressure hose from the machine.
Shutting Down &
Cleaning Up

English 15
1. Disconnect all water connections.
2. Turn on the machine for a few
seconds, until the water which had
remained in the pump exits, turn off
immediately.
3. Do not allow high-pressure hose to
become kinked.
4. Store the machine and accessories in
a room which does not reach freezing
temperatures. DO NOT store near
furnace or other sources of heat as it
may dry out the pump seals.
Failure to follow the above
directions will result in damage to
the pump assembly and accesso-
ries and will void the warranty.
Kärcher also recommends the reg-
ular practice of using a pump pro-
tector like “Kärcher Pump Guard”,
part number 9.558-998.0 (sold sepa-
rately), to prevent cold weather
damage during storage in the win-
ter months.
1. Disconnect the connector from the
water inlet.
2. Rinse out the water inlet filter in warm
water.
3. Thread the connector into the water
inlet.
This unit is maintenance free
Winterizing & Long Term
Storage Maintenance Instructions
Cleaning the Water Inlet
Filter
Maintenance

16 English
●Before cleaning any surface an
inconspicuous area should be
cleaned to test spray pattern and
distance for maximum cleaning
results.
●If painted surfaces are peeling or
chipping, use extreme caution as
pressure washer may remove the
loose paint from the surface.
●When using on surfaces which might
come in contact with food, flush
surfaces with plenty of drinking water.
●For additional cleaning tips, visit our
website:
www.Karcher.com/us/
(With or without detergent).
Pre-rinse deck and surrounding area
with fresh water. If using detergent,
apply to surface at low pressure. For
best results, limit your work area to
smaller sections of approximately
25 ft2(2.3 m²). Allow detergent to
remain on surface 1-3 minutes. Do not
allow detergent to dry on surface.
Rinse at high-pressure in a long
sweeping motion keeping the spray
nozzle approximately 3-6 in. (7.5-15
cm) from the cleaning surface. Always
clean from top to bottom and from left
to right. When moving on to a new
section of the cleaning surface, be
sure to overlap the previous section to
eliminate stop marks and ensure a
more even cleaning result.
(With or without detergent).
Pre-rinse cleaning surface with fresh
water. If using detergent, apply to
surface at low pressure. For best
results, limit your work area to smaller
sections of approximately 6 ft2(1.8
m²). Always apply detergent from
bottom to top. Allow detergent to
remain on surface 1-3 minutes. Do not
allow detergent to dry on surface, if
surface appears to be drying, simply
wet down surface with fresh water. If
needed, use special wash brush
attachment (not included) to remove
stubborn dirt. Rinse at high-pressure
from top to bottom in an even
sweeping motion keeping the spray
nozzle approximately 6 ft. (1.8 m) from
the cleaning surface.
(With or without detergent).
Pre-rinse cleaning surface with fresh
water. If using detergent or degreaser,
apply to surface at low pressure. For
best results, limit your work area to
smaller sections of approximately
25 ft2(2.3 m²). Allow detergent or
degreaser to remain on surface 1-3
minutes. Do not allow detergent to dry
on surface. Rinse at high pressure in a
sweeping motion keeping the spray
nozzle approximately 3-6 in.
(7.5-15 cm) from the cleaning surface.
For best results clean from top to
bottom and from left to right. For
Cleaning Tips
Deck Cleaning
House Siding
Cement Patios, Brick and
Stone

English 17
removing extremely stubborn stains,
use the Turbo Nozzle.
(With or without detergent).
Pre-rinse vehicle with fresh water. If
using detergent, apply to surface at
low pressure. For best results, clean
one side of vehicle at a time and
always apply detergent from bottom to
top, do not allow detergent to dry on
surface. If needed, use special wash
brush attachment (not included) to
remove stubborn dirt. Rinse at high-
pressure in a sweeping motion keep-
ing the spray nozzle approximately
6-8 in. (15-20 cm) from the cleaning
surface (distance should increase
when rinsing pin-striping or other sen-
sitive surfaces). For best results clean
from top to bottom and from left to
right. For best results, wipe surface
dry with a chamois or soft dry cloth.
(With or without detergent).
Pre-rinse cleaning surface with fresh
water. If using detergent or Degreaser,
apply detergent at low pressure. Allow
detergent to remain on surface 1-3
minutes. Do not allow detergent to dry
on surface. Rinse at high-pressure
keeping the spray nozzle
approximately 3-6 in. (7.5-15 cm) from
the cleaning surface. For removing
extremely stubborn dirt, it may be
necessary to move the spray nozzle
even closer to the surface for greater
dirt cutting action.
(With or without detergent).
Pre-rinse furniture and surrounding
area with fresh water. If using
detergent, apply to surface at low
pressure. Allow detergent to remain
on surface 1-3 minutes. Do not allow
detergent to dry on surface. If needed
use special Wash Brush Attachment
(not included) to remove stubborn dirt.
Rinse at high-pressure in a sweeping
motion keeping the spray nozzle
approximately 3-6 in. (7.5-15 cm) from
the cleaning surface. For best results,
clean from top to bottom and from left
to right.
Optional accessories are available
to further enhance your cleaning
capabilities. Information on
accessories and spare parts can be
found at www.karcher.com/int/
accessory.html
Specially formulated to protect your
pressure washer from freezing,
corrosion and premature wear.
The Pump Guard also adds lubrication
to valves and seals to prevent
sticking. Highly recommended for all
Kärcher pressure washers!
Part Number 9.558-998.0
Cars, Boats and
Motorcycles
Barbecue Grills, Outdoor
Power Equipment and
Gardening Tools
Patio and Lawn Furniture
Optional Accessories
Pump Guard

18 English
Disconnect the unit from the power
source before making any repairs.
Troubleshooting
Symptom Cause Solution
Motor will not
start
Power Cord not
plugged in.
Plug in Power Cord.
Electrical Outlet does
not supply adequate
power.
Try a different outlet.
Tripped GFCI plug. Press “Reset” button on GFCI plug.
Tripped Circuit Breaker. Reset circuit breaker.
Thermal Overload
Open.
Switch off pressure washer. The reset
comes automatically once the
temperature of the unit drops.
On/Off pedal is in the
“OFF” position.
Turn pedal to the “ON” position.
Unit does not
reach high
pressure
Diameter of garden
hose is too small.
Replace with a 5/8 inch (16mm) or
larger garden hose.
Water supply is
restricted.
Check garden hose for kinks, leaks
and blockage.
Not enough inlet water
supply.
Open water source full force.
Water inlet filter is
clogged.
Remove garden hose adapter and
rinse out in warm water.
Output
pressure
varies high
and low
Not enough inlet water
supply.
Open water source full force. Check
garden hose for kinks, leaks and
blockage.

English 19
Output
pressure
varies high
and low
Pump is sucking in air. Check that hoses and fittings are air
tight. Turn off machine and purge
pump by squeezing trigger gun until a
steady flow of water emerges through
the nozzle.
Water inlet filter is
clogged.
Remove garden hose adapter and
rinse out in warm water.
Spray Nozzle is
obstructed.
Blow out or remove debris with a fine
needle.
Calcified gun, hose or
spray wand.
Run distilled vinegar through soap
tank.
No Detergent
Detergent tube is not
connected to the
detergent tank.
Check connection.
Detergent is too thick Dilute detergent. For best results,
use Kärcher detergent.
Kinked detergent tube. Check detergent tube, remove or
straighten kinks.
A high pressure nozzle
is attached.
Make sure the nozzle is the Soap
Nozzle.
Spray Nozzle is
obstructed.
Blow out or remove debris with a fine
needle.
Garden hose
connection
leaks
Loose fittings. Tighten fittings.
Missing/worn
rubber washer.
Insert new washer.
Spray wand
leaks
Spray wand not
properly attached.
Insert the spray wand into the trigger
gun. Carefully press in against the
spring tension and twist into the
locked position.
Broken o-ring or plastic
insert.
Visit www.karcher-help.com or locate
a service center.
Symptom Cause Solution

20 English
If the symptom you are
experiencing is not listed above, or
if the provided solutions do not
solve your issue, please visit our
extensive online troubleshooting
database at:
USA/Canada:
www.karcher-help.com
Or Call:
1-800-537-4129
Pump is noisy
Pump is sucking in air. Check that hoses and fittings are air
tight. Turn off machine and purge
pump by squeezing trigger gun until a
steady flow of water emerges through
the nozzle.
Water leaks
from pump
(up to 10
drops per
minute is
permissible).
Loose fittings. Tighten fittings.
Water seals are
damaged or worn.
Visit www.karcher-help.com or locate
a service center.
Oil Drip Oil Seals are
damaged or worn.
Visit www.karcher-help.com or locate
a service center.
Symptom Cause Solution