E15
Kärcher
Supply Voltage Out of Range
Display shows E15; unit indicates overvoltage or undervoltage and will not start.
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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
Incorrect mains voltage, Faulty power supply module, Defective voltage sensing circuit on PCB, Loose mains connections
How to Fix / Troubleshooting
Safety first: Unplug the machine before opening any electrical compartments.
- Verify mains voltage: Confirm that the supply voltage matches the rating on the Kärcher nameplate (e.g., 220–240 V). Do not use step-up/step-down transformers unless specified.
- Inspect mains connections: Check the terminal block, power cord entry, and internal mains wiring for loose screws or burned terminals. Tighten or replace as needed.
- Check power supply module: On models with a separate SMPS power module, inspect for bulging capacitors or burn marks. Replace the module if damaged.
- Control PCB sensing: If hardware is intact and supply is correct, the voltage sensing circuit on the main PCB may be faulty, requiring PCB replacement.
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Repair Difficulty
Hard
4/5
Required Part
Power Supply Module
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