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I have a karcher k3.97 when i turn it on the motor runs continuously but gives out no pressure

Posted by Anonymous on

5 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 36 Answers

SOURCE: stalls when triger released

the problem may be the oil. if the oil is fine then try crimping your hose to let less water pressure through. if that still does not work lowes or home depot will fix the problem cheap. thank you for using fixya

Posted on May 01, 2009

  • 32 Answers

SOURCE: Karcher Motor Pulese On and Off

hi mark, you do have a problem with the lance.
you need to disconnect the lance and straighten a paper clip and insert down the nozzle end.
use the machine to wash the dirt in the nozzle backward down the lance.
Dirt only in nozzle end.
if still no good, purchase some nozzle cleaners and file out nozzle very slightly.

Posted on Jul 04, 2009

wiringlunati
  • 576 Answers

SOURCE: karcher k3.86 motor runs but has no pressure when

Could be a pump, but most likely the unloader valve is stuck open. After replacing/repairing the valve, do the following to prevent it in the future: after finishing using it, unhook both hoses and pull the start cord on the engine several times to empty the water from the pump and valves. This is especially necessary when using hard water.

Posted on Nov 20, 2009

  • 299 Answers

SOURCE: Karcher K2.36 motor cut out and won't restart

Yes, the water should be turned on first but if it only ran for a minute or two it should be OK. Most late model pressure washers have an automatic shutoff when the trigger on the wand is released. Turn on the water and then the machine and then squeeze the trigger on the handle of the wand and the motor should start as soon as the air is cleared from the line by the flowing water (about 10 seconds). If the unit was put away wet last season you may need to clean the nozzle with a piece of wire too.

Posted on Apr 16, 2010

Testimonial: "Thanks brobin, your advice was spot on and it is now working again, much appreciated"

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1 Answer

My Karcher 530M runs ok until I release the trigger, then it will not start again unless I switch and allow the water to run through for about 15 secs before switching on again


Hi Cliff:
My experience is that the pump pressures prevent the engine from starting, so we hold the trigger while starting.
My brother has cut a wedge of wood that he uses to jam the trigger open to bypass the problem. It can get a bit wild if the wand is not secured when the unit is started..

Aug 10, 2016 | Karcher Garden

1 Answer

NT48/1 professional karcher not working. Changed fuse in the plug yet still not working. Replaced the filter. Still not working. Could be the motor not working?


Is the motor running? If not, did you check the starting capacitor?
Did you check motor windings for continuity? Did the pump seize? Is electricity reaching the unit - wire ok?

Nov 16, 2015 | Karcher Garden

1 Answer

Is the motor of a karcher K6.91M pressure washer an induction type or does it have brush contacts.


AC motors don't have brushes. They use a process to change phase (with the capacitor) to get opposing forces on the coils. This causes the magnet field to turn the motor. Without knowing what the motor make and model is and the color of the wires, I cannot say about meter readings. Change the capacitor IF THE MOTOR is humming and getting hot but not spinning.

Jun 28, 2015 | Karcher Garden

1 Answer

Karcher 5/11c motor runs but no pressure


Firstly make sure the pressure set valve is turned the right way, fully anticlockwise I think.(if it has one I could be thinking of the next model up) and that the lance nozzle is in the correct position not set to detergent or mid point between positions. If that is ok it is probably the switch at the bottom of the machine. If under warranty send it back karcher switches are not good.

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1 Answer

Karcher K2.54M loss of all pressure


I have seen it before where the little plastic pistons overheat and melt. The unit still runs but with no pressure. I would pull the pump apart and check the pistons.

Sep 03, 2012 | Dishwashers

1 Answer

I have a Karcher K3.540 pressure washer. Won't take up detergent and motor pulses ever second if vari-lance increased towards maximim. Motor runs ok at lower pressure but can take 1min to start wh


This fault is within the control head, under the detergent valve is a small spring loaded valve that acts to induce the detergent, this will have failed, the shaft of the component breaks off the disk base leaving a small hole in the centre of the disk. This is enough to allow pressure past the component. The machine will pulse when operated and will not induce the detergent. I've looked everywhere to find this part as I have a karcher with the same fault.

Jan 22, 2012 | Karcher Garden

1 Answer

Karcher K2.36 motor cut out and won't restart


Yes, the water should be turned on first but if it only ran for a minute or two it should be OK. Most late model pressure washers have an automatic shutoff when the trigger on the wand is released. Turn on the water and then the machine and then squeeze the trigger on the handle of the wand and the motor should start as soon as the air is cleared from the line by the flowing water (about 10 seconds). If the unit was put away wet last season you may need to clean the nozzle with a piece of wire too.

Apr 16, 2010 | Karcher Garden

1 Answer

Karcher Power Washer that surges up and down with water pressure.


Before you start it up:
1. Disconnect the high pressure hose 2. Connect the water supply and turn on 3. Make sure water is flowing through the pump
Start the motor, run for about 10 seconds and then turn off.
Turn off the water supply, connect the high pressure hose, turn water back on, start the motor and away you go.

May 29, 2009 | Karcher 2500 PSI Pressure Washer

1 Answer

Karcher k7.91 pressure washer /loss of pressure


if the motor will not turn on ,thers a problem with the current excess switch , which is situated under the main power on of swith hi needs to be replced

May 04, 2009 | Karcher PSI Electric Pressure Washer

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