E5
Kärcher
Low Water or Flow Sensor Fault
Display shows E5; unit will not spray detergent even though the pump can be heard running.
Advertisements
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Advertisements
Possible Causes
Empty or incorrectly seated fresh water tank, Faulty flow sensor, Blocked solution line, Defective tank level switch
How to Fix / Troubleshooting
Safety first: Unplug the machine and remove both fresh and dirty water tanks.
- Refill and reseat tank: Fill the fresh water/solution tank to at least half. Ensure it clicks firmly into place and that the bottom valve pin is not stuck.
- Inspect tank level float: Some Kärcher tanks use a magnetic float and reed switch. Check that the float moves freely and is not jammed with scale or debris.
- Check solution lines: Follow the clear solution hose from the tank to the pump and from the pump to the spray bar. Look for kinks, pinched sections, or crystallized detergent blocking the line. Flush with warm water.
- Flow sensor check: If fitted, the flow sensor is usually in-line after the pump. Remove and inspect for debris. Clean the internal turbine gently with a soft brush and reassemble.
- Test again: Refit tanks, plug in, and test spray. If E5 persists and no flow is detected, the flow sensor or level switch may need replacement.
Advertisements
Repair Difficulty
Medium
3/5
Advertisements