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18 Troubleshooting Guide
18 Troubleshooting Guide
18.1 Pressure Washer
Before troubleshooting, switch off the pressure washer and disconnect the unit from the power supply. Relieve all system
Condition
The pressure washer does
not start although the spray
gun trigger is pulled.
The pressure washer does
not start when switched on.
The electric motor hums.
The pressure washer
switches off while in
operation.
The high-pressure pump
repeatedly switches on and
off without pulling the spray
gun trigger.
0458-004-8621-A
pressure by pulling the trigger switch. Lock the spray gun trigger.
Possible Cause
The power supply cord is not connected
to an electrical outlet.
The GFCI has interrupted the electrical
circuit.
The electric motor is too warm.
The mains voltage is too low.
The power supply cord is not connected
to an electrical outlet.
The GFCI has interrupted the electrical
circuit.
The electric motor is too warm.
There is a leak in the high-pressure
pump, high-pressure hose or spray
attachment.
Remedy
► Connect the power supply cord to a properly
installed electrical outlet.
► Reset the GFCI, @ 10.2.
► Switch off other loads connected to the same
circuit.
► If the pressure washer still does not start,
disconnect the pressure washer from the power
supply and have it inspected by an authorized
STIHL servicing dealer before further use.
► Allow the pressure washer to cool at ambient
temperatures for approximately 5 minutes.
► Clean the nozzle, @ 16.3.
► Pull and hold the spray gun trigger and switch on
the pressure washer.
► Switch off other loads connected to the same
electrical circuit.
► Connect the power supply cord to a properly
installed electrical outlet.
► Reset the GFCI, @ 10.2.
► If the pressure washer still does not start,
disconnect the pressure washer from the power
supply and have it inspected by an authorized
STIHL servicing dealer before further use.
► Allow the pressure washer to cool at ambient
temperatures for approximately 5 minutes.
► Clean the nozzle, @ 16.3.
► Have the pressure washer inspected and
repaired by an authorized STIHL servicing
dealer.
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