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Why is my pressure washer surging? Article Water flow may be restricted to the pressure washer. Check that all hoses are free of kinks, leaks, or blockage. Make certain all hoses and fittings are connected properly. Make sure to open the faucet/spigot to full force. Set the spray wand to high pressure. Clear any debris from the nozzle. If the nozzle has even a little bit of dirt in the tip, it may cause enough obstruction for the pressure washer to pulsate. If your pressure washer came with a nozzle cleaner, use it to clean the tip. If not, you can use a pin or paper clip to clear the nozzle tip of debris that may have become lodged in it. If these have been checked and the washer is still fluctuating from high to low pressure there may be air trapped in the pump. To bleed the pump of any air, turn the machine off and disconnect the high pressure hose and trigger gun from your power washer. With only the garden hose connected to the machine, turn on your water source and allow water to run through the pump of the machine for 20 or 30 seconds. Turn off the water and connect the high pressure hose and trigger gun and try using the machine again. Suggested Viewing: go to http://www.Kärcher residential.com/en/video_library.php and click on the ""Troubleshooting: Inconsistent Pressure"" video. Although the pressure washer featured in the view is gas powered, most of the steps apply to electric pressure washers as well.   How can we improve this information? Not the information you were looking for? Let us know how we can better answer this question. We routinely review user comments to help us better provide the information you are seeking. Please note that this is for feedback only, you will not receive a direct response to your comment. If you need a personal response, please click on "Submit a Tech Support Ticket" below. Thanks! Image verification required Please enter the characters that appear to the right in the space provided. This is just to verify that you are a human. Full Name: E-mail Address: (optional) Your feedback on how to improve the answer to the above question: