E7
Black+Decker
High-Speed Motor Drive Fault
Vacuum runs only on low power, LED flashes red seven times when high-power mode is selected
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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
Faulty speed control circuitry on main PCB, High resistance in trigger or mode switch, Motor winding damage at high-speed tap, Low battery voltage under load
How to Fix / Troubleshooting
Safety first: Remove the battery before inspecting controls.
- Verify battery charge: Ensure the battery is fully charged. Low voltage can prevent high-power mode from engaging.
- Check for heavy load: Clean filters, bin, and brush bar to reduce load on the motor. Try high-power again.
- Inspect mode switch: Operate the power/mode selector several times with the battery removed to clear dust from contacts. Ensure it clicks positively into each position.
- Test with another battery: If available, try a second battery to rule out voltage sag.
- Service electronics: If high-power still fails and E7 persists, the main control PCB or motor windings are likely faulty and should be replaced by a service center.
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Repair Difficulty
Hard
4/5
Required Part
Main Control PCB
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