Karcher K 2.21 Operator's Manual - Troubleshooting
English
15
CAUTION
Disconnect the machine from the power
source before making any repair.
Troubleshooting
Symptom
Cause
Solution
Motor will not start
On/Off switch is in the “OFF”
(O) position.
Turn switch to the “ON” (I)
position
Tripped GFCI plug.
Press “RESET” button on
GFCI plug.
Power cord is not plugged in. Plug in power cord.
Electrical outlet does not
supply adequate power.
Try a different outlet.
Unit does not reach
high pressure.
Diameter of garden hose is
too small.
Replace with a 5/8 inch or
larger garden hose.
Water supply is restricted.
Check garden hose for kinks,
leaks and blockage.
Not enough inlet water
supply.
Open water source full force.
Water inlet filter is clogged.
Remove filter and rinse out in
warm water.
Spray wand is on low
pressure position.
Turn spray wand to high
pressure position.
Output pressure
varies high and low.
Not enough inlet water
supply.
Turn water on full force.
Check garden hose for kinks,
leaks or blockage.
Pump is sucking air.
Check that hoses and fittings
are air tight. Turn off machine
and purge pump by squeez-
ing trigger gun until a steady
flow of water emerges
through the nozzle.
Water inlet filter is clogged.
Remove filter and rinse out in
warm water.
Discharge nozzle is
obstructed.
Blow out or remove debris
with a fine needle.
Calcified gun, hose or spray
wand.
Run distilled vinegar through
detergent suction tube.