11
TROUBLESHOOTING
–
continued
Symptom Cause
Solution
No detergent.
Garden hose
connection leaks.
Pump is noisy.
Water leaks
from pump.
Oil Drip.
Detergent is too thick.
Dilute detergent. For best results,
use Kärcher detergent.
Filter on detergent suction
tube is clogged.
Run warm water through
filter to remove debris.
Detergent filter valve is at
lowest setting.
Set detergent filter valve
to a higher setting.
Damaged or clogged
detergent suction tube.
Remove obstruction or
replace detergent suction tube.
A high pressure nozzle
is attached.
Replace with black
detergent nozzle.
Discharge nozzle
is obstructed.
Blow out or remove debris
with fine needle.
Loose fittings.
Tighten fittings.
Missing/worn rubber washer.
Insert new washer.
Spray wand not properly
attached.
Broken o-ring.
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.
Loose fittings.
Check that all fittings are tight.
Call service center.
Water seals are
damaged or worn.
Thermal protection device
will auto reset.
Thermal protection
device is activated.
Call Kärcher customer service
hotline and order an o-ring.
Pump is sucking air.
Oil seals are damaged
or worn.
Call service center.
Spray wand leaks.
Slide the spray wand into the gun.
Turn the wand collar clockwise onto
the gun threads until tight.
Detergent suction tube
not properly connected
to the machine.
Check connection.
If you encounter any additional
difficulties not listed, please call
our service center for help.
In USA Call:
1-800-537-4129
or visit our website: www.karcher-usa.com
HD3501 Manual 4/22/02 6:57 PM Page 12
