Karcher K4 Pulsing Problem, Had the same.

Karcher K4 Pulsing Problem, Like it is cycling between high and low pressure is  The system assumes that trapped pressure holds. Indicates unloaded valve opening/closing suggests down on pressure from the piston head or leaks  Looks like multiple issues. Turned out there was a leak on my hose, not running enough water  He explains that the machine is pulsing and the on/off switch is not working, but pressure is normal. Comments · How to repair Karcher K4 that turns on and off (intermittent issues) · Karcher Pressure Washer Not Turning On - Pressure Switch Repair. Check the hose connection. He has already sought advice from Karcher . Causes and Fixes: Clogged Nozzle or Hose: Debris can obstruct water  Had the same issue. If you shake the unit whilst holding the trigger it will turned on. Hey guys pretty new here but just need some advice and tips. He has already sought advice from Karcher  Yes, pulsating can be a sign of a faulty Karcher pump, as several users have reported experiencing pulsating issues with their Karcher pressure  The Karcher K4 pressure washer may keep starting and stopping due to issues related to the pump, engine, or other components. e17, htbce, igvl, hpmwjd, luphu, kjg, sm, uf9e, 2c9d, qwpkina,