How to Troubleshoot a Karcher Power Washer

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Karcher high-pressure power washers can be either gas powered or electric. Each model of Karcher pressure washers connects to a household garden hose for a water supply and has a reservoir for detergent additives. For the pressure washer to work effectively, there must be a suitable amount of water pressure and a reliable power source. Various situations can lead to issues that prevent the power washer from performing. Troubleshooting these issues will help identify the root of the problem and provide a solution in most cases.

Pressure issues

  • Check the connected garden hose for kinks, clogs or leaks. Straighten any kinks and clear any blockage. Replace the hose if leaks are present.

  • Open the water source tap completely to allow maximum water pressure.

  • Check the filter for clogs or blockage. Remove the filter. Rinse the filter in warm tap water.

  • Inspect the discharge nozzle for blockage. Blow out or remove any obstructions with a small wire or needle.

  • Check the gun, hose and spray wand for calcification in the form of white buildup. Run distilled vinegar through the detergent suction tube to remove calcification deposits.

  • Inspect the unit for any water leaks. Make sure all fittings are tightly secured.

Other Issues

  • If the motor will not start, make sure the unit is plugged into a working electrical outlet if it is an electric model. Try a different outlet if needed. If plugged into a GFCI outlet, press the reset button.

  • If the motor will not start on a gas-powered model, check the gas tank. Make sure the tank is full. If not, fill it with fresh gasoline.

  • If the detergent is not feeding through, check the detergent suction tube filter. Remove the filter. Run warm tap water through the filter to remove clogs or debris.

  • If oil leaks are occurring, the oil seals are worn. Contact Karcher customer support for assistance.

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References

  • "Karcher High Pressure Washer Operator Manual"; Karcher North America Consumer Products; 2009
  • Photo Credit electrical outlet image by Mat Hayward from Fotolia.com
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