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Hi my karcher 4.97 wont shut off. it works properly, as it should pumps water correctly when turned on and when the trigger is released on the lance handle the motor keeps pumping It wont stop.

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  • Karcher Master
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Replace the pressure regulator

Posted on Dec 09, 2016

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Karcher troubleshooting


check your lance nozzle is not blocked... Remove the lance from the trigger assy and see if you have water coming through then. If you do then the nozzle is blocked :@)

Jul 21, 2014 | Karcher K2.26 Electric Power Washer

1 Answer

What is this problem - Karcher 3.86 electric pressure washer: humming noise, plug gets very hot, then unit shuts down?


Your pressure washer is either not fitted with a run/stop device in which case like mine you have to switch off within a few seconds of closing the trigger. Check your model features?
The humming noise is the motor stalled out against the pump because there is nowhere for the water to go. The shutoff is caused by the safety overload switching off after overheat.
Or, it has a pressure operated run/stop which is not working. Because water and electricity don't mix, I would suggest getting more specific help. You can download Karcher manuals /spares lists online from Karcher specialists but remember electricity is the silent killer.

May 20, 2014 | Karcher Garden

1 Answer

Karcher 2500ph pressure washer spill valve has been replaced pull wand trigger pressure good for 3 or 4 seconds drops off for a second or 2 goes back to good pressure for 3 or 4 seconds drops off again for...


If you have a Karcher then you should always post your machines barcode.

full article on nozzles :
http://repairshed.blogspot.com/2013/09/pressure-washer-lance-nozzles-what-you.html

The spill valve operates at approx 20% higher than specified pressure washer operating pressure. If you have any lance issues then the pressure could be running higher than specified (machine running at same pressure as spill valve operation pressure)

your machine produces a fixed flowrate of water (maybe 8 litres per minute) and your nozzle is a fixed size. the diameter of the nozzle determines the back pressure. A piece of debris could further close your nozzle orifice and increase the back pressure. Using a new lance that has the wrong nozzle fitted can also cause this issue.

The karcher barcode is on a silver sticker and is usually 15 digits long. Example 156987400000123 is actually model 1.569-874.0 and serial number 00123....

Aug 15, 2013 | Garden

1 Answer

Karcher 395 motor does not stop running


if your machine was factory fitted with 'total stop system' TSS and has always stopped in the past then it is an issue with many possible parts !

does the machinw still operate at full pressure ?
if the machine can produce full pressure then it only has to produce 20 % more to actuate the TSS piston. When the stop piston moves it presses against an electrical switch tjat breaks the circuit. Producing 20% more pressure requires that your machine has no water leaks in the pump, hose, trigger gun or lance. Once you release the trigger the path back from the trigger to the pump TSS piston must be fully sealed.....

If you have a Karcher then you should always post your machines barcode.
The karcher barcode is on a silver sticker and is usually 15 digits long. Example 156987400000123 is actually model 1.569-874.0 and serial number 00123....

Aug 11, 2013 | Garden

2 Answers

My electric Karcher pressure washer does not shut off.


this can be that you need to bleed the system of air or that there is a problem with your trigger gun sticking when you release the trigger.
These are two things I would check before you go into the machine.

May 14, 2012 | Karcher Garden

2 Answers

Honda 2400 psi before it went out i cold tap the end of the wand on the ground and the pressure would return now when pull the trigger there is no pressure only a fine spray .its a karcher with a honda...


hi,
there is a small ball bearing inside the nozzle on the end of the lance , this can get jammed or missaligned and the nozzle orifice can get blocked , clean this or replace the whole lance with another 200 Bar lance .

hope this helps

Feb 01, 2010 | Honda Karcher G2400HH-R Pressure Washer

1 Answer

Australian Karcher 2.91 intermitant start


Under the top cover there is a micro switch that sometimes dislodges
This switch is for auto cut off when you release the trigger

Jul 27, 2009 | Karcher K2.26 Electric Power Washer

1 Answer

No pressure unless i take the nosle off , pull trigger and put nossel back on then it's ok until i release the trigger again ?


unloader valve sticking in the pump head. remove unloader valve/ pressure reducing valve as per parts manual.

It will probably be caked up in white crystal type deposits if its an aluminium pump head. clean off the deposits and inspect the 'o' rings. if 'o' rings ok , apply silicon grease and refit.

It could also be a partially blocked lance jet not allowing enough water to come out of the lance if it is a flow sensitive unloader valve.

Jul 11, 2009 | Karcher 2500 PSI Pressure Washer

1 Answer

Karcher pressure washer trigger problem


The wands that it will not run with would most likley have a little dirt in the tip of the nozzle. This would not allow the water to flow through in turn activating the pressure switch and shutting the machine down

Troy

Jul 05, 2009 | Karcher K2.26 Electric Power Washer

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