E15
LawnMaster Main Control Board Overheating

Robot mower displays E15 and shuts down unexpectedly during operation.

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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

Blocked ventilation openings, Excessive ambient temperature, Failing main board components, Dust and grass buildup on heat sinks

How to Fix / Troubleshooting

Safety first: Turn OFF the mower, disconnect the battery, and allow it to cool before opening the housing.

  • Check vents: Ensure all cooling slots and vents on the mower body are free from grass, dust, and debris. Clean with a soft brush.
  • Inspect internal cooling: Open the housing and look for heat sinks on the main control board. Clean off dust and grass clippings carefully.
  • Verify environment: Avoid operating the mower in extreme heat or direct sun for long periods. Adjust mowing schedule to cooler times of day.
  • Check for water damage: Look for corrosion or discoloration on the main board that may cause overheating.

If E15 continues after cleaning and adjusting usage conditions, the main control board may have failing components and should be replaced by a qualified technician.

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Repair Difficulty

Hard 4/5

Required Part

Main Control Board
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