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If you are unable to shut off the pressure from the wand, there may be an issue with the unloader valve that is stopping it from switching into bypass mode when the trigger wand is released. The unloader valve is designed to respond to the spike in pressure created when the trigger wand is released, and to divert the flow of water coming from the pump to bypass the pressure hose and flow back into the intake end of the pump. If the unloader valve fails to switch into bypass mode, water may continue to flow out of the trigger wand. This may also cause damage to the wand. If you are unable to shut off the pressure from your power washer, stop the engine and discontinue use immediately. The unloader valve should be removed and possibly replaced if found to be malfunctioning. The inability to stop the flow of high-pressure water from the wand can be dangerous and should be fixed before continuing to use the machine.

Karcher Garden | Answered on Dec 29, 2017


pulsations indicates an pressure controller suffering from a partially blocked jet at the wand end
blocks up p pressure drops off , unblocks starts pressure to repeat the cycle

Karcher Garden | Answered on Nov 25, 2017


indicates a problem in the water supply
obstruction Ki***k in the supply hose, tap washer problem etc

Karcher... | Answered on Nov 16, 2017


For a service manual, contact Karcher directly.

Karcher Garden | Answered on Oct 10, 2017


Look on u tube I found some system sets ups for my house the video's where very help full .

Karcher Plumbing | Answered on Oct 07, 2017

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