E15
Kress
Main Control Board Communication / Firmware Error
Robot mower displays E15 and will not start; often after firmware update or power surge.
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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
Corrupted firmware, Internal communication bus fault, Damaged main control board, Incomplete software update
How to Fix / Troubleshooting
Safety first: Turn OFF main power before connecting or disconnecting any service tools.
- Power cycle: Turn the mower OFF, wait 60 seconds, then turn it ON again. Sometimes a full power reset clears transient communication errors.
- Check for update options: If your Kress model supports app or USB updates, follow the official Kress instructions to re‑apply the latest firmware.
- Inspect for water damage: Open the housing and visually inspect the Main Control Board for signs of moisture, corrosion, or burnt components. Do not power the mower if the board is wet; dry it thoroughly and replace if corroded.
- Contact service: If E15 persists after a clean power cycle and firmware re‑flash (where applicable), the main board is likely defective and should be replaced by an authorized technician.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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