E15
Tristar
Firmware / Internal Memory Error
Vacuum shows E15 and will not start; often after long-term storage.
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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 on main PCB, Failed memory IC, Voltage spike during previous use or charging
How to Fix / Troubleshooting
Safety first: Remove the battery pack before any extended troubleshooting.
- Power cycle: Remove the battery for at least 5 minutes. Press and hold the power button for 20 seconds to discharge the system, then reinstall the battery and test.
- Check charger and power source: Use only the original Tristar charger and avoid unstable power sources (e.g., generators without regulation).
- Firmware reset (if supported): Some models may support a button combination reset (consult the user manual). Perform this reset if available.
- Board replacement: If E15 persists, the main control PCB is likely defective and must be replaced. Firmware reprogramming typically requires manufacturer tools and is not a DIY procedure.
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Repair Difficulty
Professional Required
5/5
Required Part
Tristar Main Control PCB
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