Having problems with your Karcher Pressure Washers ?

Karcher 2.56 keeps pulsing on and off whenever high pressure nozzle is attached. I have tried different nozzles and same thing is happening. when i press the lance without any attachment it works fine


Answers :

Make sure you have bled all air from the system. Also make sure you have sufficient water supply; if house water pressure is too low or if your hose is too long or doesn't allow full flow, you may not be getting enough water to the unit.
If this PW has never worked properly -- it is possible that the seller sent the wrong pressure nozzles. All pressure washers have nozzles that are matched to the flow-rate and pressure of the machine. If they sent Nozzles that were really supposed to be for a machine of lower flow rate (smaller orifice nozzle) this would cause exactly the problem as you are describing it. This is because the electric motor does not have sufficient horse power to force the xxGPM out the smaller hole, so the motor surges and stalls, repeatedly.

Another possibility: Try a different electrical plug outlet. It is possible that the motor is not able to draw enough current from your plug. Sometimes older house plugs, because of the way they are installed, will not provide a good, solid 15 amp circuit like it should. As the motor comes under a load (i.e., when you install pressure nozzle) it draws more current to feed the work. So try a different plug and be sure it's on one of your circuits that is not loaded with other household items like the refrigerator, microwave oven, etc. The little washer all by itself will pull close to 15 amps, which is the max capacity of older home circuits.

Last, Look for the unloader valve. This is device that allows the water to go\012 into a by-pass loop when the trigger is not pulled. It sounds like the\012 unloader could be out of adjustment. Counter-clockwise will lighten the \012spring / Clockwise will tighten the spring. Toy with different \012adjustments -- ccw 1 complete revolution/test for improvement. Repeat. (it should have a plastic handle on top of it that can turn \012either direction. But look at it first, as there may be a "set" nut \012holding in one place.)
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Karcher 2.56 keeps pulsing on and off whenever high pressure nozzle is attached. I have tried different nozzles and same thing is happening. when i press the lance without any attachment it works fine


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