E
esmithAug 20, 2025
What to do if Kärcher Pressure Washer output pressure varies?
- DdavisbarbaraAug 21, 2025
If the output pressure of your Kärcher Pressure Washer varies from high to low, it could be due to several reasons. Make sure that you turn the water on full force and check the garden hose for any kinks, leaks, or blockages to ensure enough inlet water supply. Another possibility is that 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 through the nozzle. An obstructed spray nozzle can also cause pressure variations; blow out or remove debris with a fine needle. Finally, if the gun, hose, or spray wand is calcified, run distilled vinegar through the detergent suction tube.