Why does the output pressure of my Kärcher Pressure Washer vary high and low?
- JJanice JohnstonAug 14, 2025
If the output pressure of your Kärcher Pressure Washer varies, ensure that the water is turned on full force and check the garden hose for kinks, leaks, or blockages. If the pump is sucking air, check that hoses and fittings are airtight, then turn off the machine and purge the pump by squeezing the trigger gun until a steady flow of water emerges. Clean the water inlet filter by removing and rinsing it in warm water. Clear any obstructions from the discharge nozzle with a fine needle, and run distilled vinegar through the detergent suction tube to address calcification in the gun, hose, or spray wand.










