Kärcher K 3.68 M User Manual (English)

Questions and Answers:

G
Gary McneilAug 13, 2025
Why is my Kärcher K 3.68 M Pressure Washer not reaching high pressure?
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  Janet ArnoldAug 14, 2025
  If your Kärcher Pressure Washer isn't reaching high pressure, first, replace the garden hose with a 5/8 inch or larger one. Then, check the garden hose for any kinks, leaks, or blockages that might be restricting the water supply. Ensure the water source is fully open. Also, remove and rinse the water inlet filter in warm water if it's clogged. Finally, make sure the spray wand is set to the high-pressure position.
L
Lindsay ReyesAug 18, 2025
Why does the output pressure of my Kärcher K 3.68 M Pressure Washer vary?
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  Mr. Kyle CurryAug 18, 2025
  If the output pressure of your Kärcher Pressure Washer varies, ensure the water is turned on full force and inspect the garden hose for kinks, leaks, or blockages. Check that all hoses and fittings are airtight to prevent the pump from sucking air; if it is, turn off the machine and purge the pump by squeezing the trigger gun until a steady water flow emerges from the nozzle. Clean the water inlet filter by removing it and rinsing in warm water. Clear any obstructions from the discharge nozzle, using a fine needle if necessary. Lastly, if the gun, hose, or spray wand are calcified, run distilled vinegar through the detergent suction tube.
K
Kristine BullockAug 21, 2025
Why won't my Kärcher K 3.68 M Pressure Washer motor start?
- K
  Katherine LittleAug 21, 2025
  If your Kärcher Pressure Washer motor won't start, make sure the On/Off switch is in the “ON” (I) position. Check that the power cord is properly plugged in and that the electrical outlet supplies adequate power. If you have a GFCI plug, press the “RESET” button. Also, if the circuit breaker tripped, switch off the pressure washer; it will reset automatically once the unit's temperature drops.
J
Jordan ChristensenAug 25, 2025
Why is my Kärcher Pressure Washer not dispensing detergent?
- A
  Amy AlvarezAug 26, 2025
  If your Kärcher Pressure Washer isn't dispensing detergent, check that the detergent suction tube is properly connected to the machine. If the detergent is too thick, dilute it—Kärcher detergent is recommended for best results. Clear any debris from the filter on the detergent suction tube by running warm water through it. If the detergent suction tube is damaged or clogged, remove the obstruction or replace the tube. Finally, ensure the spray wand tip is in the low-pressure position, and clear any obstructions from the discharge nozzle using a fine needle.
P
Paul Nelson MDAug 29, 2025
What to do if the garden hose connection leaks on my Kärcher K 3.68 M?
- J
  James RichardsonAug 29, 2025
  If your Kärcher Pressure Washer garden hose connection is leaking, start by tightening the fittings. If the leak persists, check for a missing or worn rubber washer and insert a new one.
J
Jonathan KingSep 1, 2025
Why is the pump on my Kärcher K 3.68 M Pressure Washer so noisy?
- J
  Jose WallaceSep 1, 2025
  If your Kärcher Pressure Washer pump is noisy, it might be sucking air. Ensure that all hoses and fittings are airtight. Turn off the machine and purge the pump by squeezing the trigger gun until a steady flow of water emerges through the nozzle.
J
Jesse BondSep 5, 2025
What to do if the spray wand leaks on my Kärcher K 3.68 M Pressure Washer?
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  Monica KellerSep 5, 2025
  If your Kärcher Pressure Washer spray wand is leaking, make sure the spray wand is properly attached by inserting it into the trigger gun, pressing against the spring tension, and twisting it into the locked position. If the issue continues, this may indicate a broken o-ring or plastic insert and you should contact Customer Support.
A
alicia04Sep 9, 2025
Why is water leaking from the pump of my Kärcher K 3.68 M?
- M
  Michelle KellerSep 9, 2025
  If water leaks from the pump of your Kärcher Pressure Washer (up to 10 drops per minute is permissible), check that all fittings are tight. If the leak persists, it may indicate that the water seals are damaged or worn, and you should contact Customer Support.

Kärcher K 3.68 M Specifications

General

Power	1.7 kW
Pressure	20-120 bar
Water Flow Rate	420 l/h
Hose Length	6 m
Power Cable Length	5 m
Max. water inlet temperature	40°C
Voltage	230 V
Frequency	50 Hz

Summary

Model Overview

Important Safety Instructions

Grounding Instructions

Details the importance of proper grounding for electrical safety and connection requirements.

Safety Alert Symbols

Explains the meaning of DANGER, WARNING, and CAUTION symbols to indicate potential hazards.

Ground Fault Circuit Interrupter Protection

Water Supply

Assembly Instructions

Required Tools

Lists the necessary tools for assembling the pressure washer unit.

Step-by-Step Assembly Guide

Provides visual and textual guidance for assembling the pressure washer components.

Operating Instructions

Connecting Hose and Wand

Details how to connect the high pressure hose and select the spray wand for operation.

Starting and Stopping Operation

Explains how to turn on the pressure washer, operate the trigger gun, and safely turn it off.

Using the Accessories

Vario Power Spray Wand

Describes how to adjust the Vario Power Spray Wand for different pressure settings and detergent application.

Dirtblaster® Wand

Explains the features and recommended uses of the Dirtblaster® rotating spray wand for tough dirt.

Working with Detergents

Detergent Application Steps

Guides users on how to apply detergent using the Vario Power Spray Wand set to low pressure.

Cleaning Up After Detergent Use

Details the process of flushing the detergent system with fresh water after use.

Recommended Detergents

Lists Kärcher-approved detergents and specifies those that should not be used to prevent damage.

Taking a Break

Shutting Down & Clean-Up

Winterizing and Long-Term Storage

Care and Maintenance Instructions

Cleaning the Water Inlet Filter

Step-by-step guide on how to remove, clean, and reinsert the water inlet filter.

Unit Maintenance Status

States that the unit is designed to be maintenance-free for the user.

Cleaning Tips

Deck Cleaning Guide

Advice on cleaning decks using the pressure washer with or without detergent, detailing pressure and motion.

House Siding Cleaning

Guidance for cleaning house siding, including pressure, detergent application, and brush use.

Cement Patios, Brick and Stone Cleaning

Instructions for cleaning hard surfaces like patios and brickwork with pressure and detergent.

Vehicle, Boat & Motorcycle Cleaning

Tips for washing vehicles, boats, and motorcycles, including detergent and brush use.

Grill & Outdoor Equipment Cleaning

Cleaning advice for grills, garden tools, and other outdoor equipment, including nozzle distance.

Patio & Lawn Furniture Cleaning

How to clean patio and lawn furniture effectively, from top to bottom.

General Cleaning Recommendations

General advice for cleaning, including testing spray patterns and caution with painted surfaces.

Optional Cleaning Accessories

Pump Guard

Description of Pump Guard for protecting the pressure washer from freezing, corrosion, and wear.

Water Pumping Kit

Details the Water Pumping Kit for quickly drawing large quantities of water from standing sources.

25 Ft. Extension /Replacement High-Pressure Hose

Information on replacement or extension high-pressure hoses compatible with Kärcher pressure washers.

66" Extension Wand

Describes the 66-inch extension wand for reaching high areas like second-story windows.

Rotating Wash Brush

Information on the Rotating Wash Brush for cleaning smooth surfaces like painted finishes and glass.

Soft Clean Washing Brush

Details the Soft Clean Washing Brush with soft bristles for gentle cleaning of various surfaces.

25 ft. Pipe Cleaning Kit

Describes the pipe cleaning kit for clearing blockages in pipes, drains, and downspouts.

Wet Sandblasting Kit

Information about the Wet Sandblasting Kit for eco-friendly removal of paint and rust.

Detergent Foamer Attachment

Details the Detergent Foamer Attachment for generating a thick foam spray for cleaning.

T 100 Wide Area Surface Cleaner

Describes the T 100 Surface Cleaner for efficient, streak-free cleaning of patios and driveways.

Troubleshooting

Motor Will Not Start

Lists common causes and solutions for the pressure washer motor failing to start, such as power or switch issues.

Unit Does Not Reach High Pressure

Troubleshooting steps for low pressure issues, including checking the garden hose, water supply, and inlet filter.

Output Pressure Varies

Addresses issues with fluctuating output pressure, including air in the pump, clogged filters, and nozzle obstructions.

No Detergent Flow

Solutions for when no detergent is being drawn, such as checking connections, dilution, or filter obstructions.

Garden Hose Connection Leaks

How to fix leaks at the garden hose connection point by tightening fittings or replacing washers.

Spray Wand Leaks

Troubleshooting steps for leaks occurring at the spray wand connection due to improper attachment or worn parts.

Noisy Pump

Addresses causes of pump noise, such as air being sucked into the pump or worn seals.

Water Leaks from Pump

Solutions for water leaks from the pump, including checking fittings and worn water seals.

Oil Drip

Troubleshooting for oil drips, likely caused by damaged or worn oil seals in the pump.

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