Karcher K 2.425 Operator's Manual - Troubleshooting

14 English

WARNING 

Disconnect the unit from the power 

source before making any repair.

TROUBLESHOOTING

Symptom

Cause

Solution

Motor will not start On/Off switch is in the “OFF” 

(0) position.

Turn switch to the “ON” (I) po-

sition

Power cord is not plugged in. Plug in power cord.

Electrical outlet does not sup-

ply adequate power.

Try a different outlet.

Tripped GFCI plug.

Press “RESET” button on 

GFCI plug.

Tripped circuit breaker.

Switch off pressure washer. 

The reset comes automatically 

once the temperature of the 

unit drops.

Unit does not 

reach high pres-

sure.

Diameter of garden hose is too 

small.

Replace with a 5/8 inch or larg-

er 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 pres-

sure 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 squeezing 

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 obstruct-

ed.

Blow out or remove debris with 

a fine needle.

Calcified gun, hose or spray 

wand.

Run distilled vinegar through 

detergent suction tube.