Karcher K 3.92 M manual Symptom Cause Solution

Symptom	Cause		Solution
No detergent.	Detergent suction tube not		Check connection.
	properly connected to the
	machine.
	Detergent is too thick.		Dilute detergent, for best re-
			sults use Kärcher detergent.
	Filter on detergent suction		Run warm water through filter
	tube is clogged.		to remove debris.
	Damaged or clogged deter-		Remove obstruction or repla-
	gent suction tube.		ce detergent suction tube.
	Spray wand is in high pressu-		Turn spray wand tip to low
	re position.		pressure position.
	Discharge nozzle is obstruc-		Blow out or remove debris
	ted.		with fine needle.
Garden hose con-	Loose fittings.		Tighten fittings.
nection leaks.
	Missing/worn rubber washer.		Insert new washer.
Spray wand leaks.	Spray wand not properly atta-		Insert the spray wand into the
	ched.		trigger gun. Carefully press in
			against the spring tension
			and twist into the locked posi-
			tion.
	Broken o-ring or plastic in-		Call Customer Support.
	sert.
Pump is noisy.	Pump is sucking air.		Check that hoses and fittings
			are air tight. Turn off machine
			and purge pump by squee-
			zing trigger gun until a steady
			flow of water emerges throu-
			gh the nozzle.
Water leaks from	Loose fittings.		Check that all fittings are
pump (up to 10			tight.
drops per minute is
	Water seals are damaged or		Call Customer Support.
permissible).	worn.
Oil Drip.	Oil seals are damaged or		Call Customer Support.
	worn.
Kärcher Customer Support USA		If you encounter any additional difficul-
Call: 1-800-537-4129for help or visit
		ties not listed, please call for help.
our website: www.karcher-usa.com

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