Kärcher K1900PS - Troubleshooting Guide; Motor Not Starting Issues; Low Pressure Issues; Variable Pressure Issues

18 English
Disconnect the unit from the power
source before making any repairs.
Troubleshooting
Symptom Cause Solution
Motor will not
start
Power Cord not
plugged in.
Plug in Power Cord.
Electrical Outlet does
not supply adequate
power.
Try a different outlet.
Tripped GFCI plug. Press “Reset” button on GFCI plug.
Tripped Circuit Breaker. Reset circuit breaker.
Thermal Overload
Open.
Switch off pressure washer. The reset
comes automatically once the
temperature of the unit drops.
On/Off pedal is in the
“OFF” position.
Turn pedal to the “ON” position.
Unit does not
reach high
pressure
Diameter of garden
hose is too small.
Replace with a 5/8 inch (16mm) 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 garden hose adapter and
rinse out in warm water.
Output
pressure
varies high
and low
Not enough inlet water
supply.
Open water source full force. Check
garden hose for kinks, leaks and
blockage.