E07
Stihl
Solution Flow Sensor / Low Flow Detected
Display shows E07; solution pump runs but no water reaches the brush head
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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.
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Possible Causes
Clogged solution flow sensor, blocked spray nozzles, kinked solution hose, faulty flow sensor wiring
How to Fix / Troubleshooting
Safety: Unplug the unit and depressurize by squeezing the trigger with power off.
- Clean spray nozzles: Remove the spray bar or individual nozzles at the brush head. Soak them in warm water with mild detergent and clear any mineral deposits with a soft brush or toothpick (do not enlarge the orifice).
- Inspect hoses: Trace the solution hose from the pump outlet to the spray bar. Straighten any kinks and ensure quick-connect fittings are fully engaged.
- Service flow sensor: Locate the in-line flow sensor (often a small plastic body with two wires). Remove and flush it with clean water to dislodge debris. Reinstall with correct flow direction.
- Check wiring: Ensure the flow sensor connector is secure on the control board and there are no broken wires at the sensor body.
After reassembly, run the unit with clean water only to confirm steady spray and that E07 clears.
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Repair Difficulty
Medium
3/5
Required Part
Solution Flow Sensor
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