Despite a steady water supply, your Kärcher pressure washer may be losing pressure for several reasons:
• Clogged filters may limit water flow. Over time, debris can clog the water inlet and spray nozzle filters, reducing pressure. Washing these filters with warm water and soap as directed in the user manual can fix this.
• Air trapped in the system may also cause problems. Pressure loss and pump fluctuations can result from air bubbles. For Kärcher model-specific air bleeding instructions, consult your user manual. Leaky hoses, connections, or seals can let air into the system, causing pressure loss.
• Pump issues could also be to blame. Wear and tear on pump components can reduce efficiency and pressure loss. A qualified technician should evaluate and repair pump issues if you suspect them. Low water pressure can also cause pressure loss, so make sure your source's water pressure meets your Kärcher model's. Finally, make sure your pressure washer's detergent and pressure settings are set according to the user manual. In some models, incorrect settings can cause pressure loss.
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