18 Troubleshooting Guide
Before troubleshooting, switch off the pressure washer and disconnect the unit from the power supply. Relieve all system
Condition
The water pressure
fluctuates or drops.
The shape of the water jet
has changed.
Detergent is not being drawn
in.
The connections of the
pressure washer, high-
pressure hose, spray gun or
spray lance are stiff.
0458-620-8621-A
pressure by pulling the trigger switch. Lock the spray gun trigger.
Possible Cause
There is not enough water.
The nozzle is blocked.
The water intake screen is blocked.
The high-pressure pump, high-pressure
hose or spray attachment is leaking.
The nozzle is blocked.
The nozzle is worn.
The detergent container is empty.
The nozzle of the detergent spray set is
blocked.
The gaskets of the connections have not
been greased.
Remedy
► Open the water tap fully.
► Make sure that a sufficient quantity of water is
available.
► Clean the nozzle, @ 16.2.
► Clean water intake screen, @ 16.3.
► Ask a STIHL servicing dealer to inspect the
pressure washer.
► Clean the nozzle, @ 16.2.
► Insert a new nozzle.
► Fill the container with detergent.
► Clean nozzle of the detergent spray set.
► Grease the gaskets. @ 17.3
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