Manual for K 4.450

Manual for K 4.450

Brand: KÄRCHER

Category: Pressure Washer

Document Type: Manual

Language: EN

Available Languages: ES , EN

Uploaded: April 20, 2026, 8:12 p.m.

Warranty Information

Warranty terms are established by the sales company and cover material defects or manufacturing faults.

Commissioning/Operations

Install wheels, trigger gun storage, and remove the trigger gun. Insert the high-pressure hose into the trigger gun. Connect the water hose to the appliance and water supply. Open the water tap. Plug in the appliance and switch it on to "I/ON".

Operation

Hold the trigger gun and spray lance firmly. Unlock and pull the lever to switch on the appliance. Adjust pressure with the Vario Power lance ("Min" to "Max" position). For detergent, use the "Mix" position. The Dirtblaster is for tough dirt, without detergent. The wash brush is suitable with detergent.

Working with detergent

Use only KÄRCHER detergents. Fill the tank. Use the Vario Power lance in "Mix" position. Apply detergent to a dry surface, let it react, then rinse with high-pressure water.

Interrupting and finishing operation

Release and lock the trigger gun lever. For longer breaks, switch off the appliance. At the end, detach the high-pressure hose without pressure. Rinse the appliance after using detergent. Turn off water, disconnect supply, release remaining pressure, lock lever, and unplug.

Troubleshooting and error codes

FaultSolution
Appliance not runningPull trigger lever. Check voltage and mains cable.
Not building pressureCheck lance, purge, water supply, clean sieve.
Not starting, motor humsPull trigger lever, then "I/ON".
Pressure fluctuationsClean nozzle, check flow.
LeakingContact customer service if severe.
No detergent intakeUse Vario Power in "Mix", clean filter/hose.
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