E8
DeWalt
Motor Speed Feedback / Hall Sensor Fault
Vacuum runs but speed is erratic; E8 code or alternating red/amber LEDs
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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
Failed motor hall sensor, Damaged sensor wiring, Loose connector on control PCB, Debris interfering with sensor magnet
How to Fix / Troubleshooting
Safety: Remove the battery and wait for the motor to stop completely before disassembly.
- Check for mechanical drag: Ensure the fan and motor shaft spin freely by hand (if accessible). Binding can cause speed fluctuations.
- Inspect wiring: Locate the small wires from the motor to the control PCB (often 3–5 conductors). Check for breaks, pinches, or loose connectors.
- Clean motor area: Use compressed air to blow out dust and debris around the motor endbell where the sensor is located.
- Test with no load: Run the vacuum without hose or accessories. If speed still surges and E8 appears, the hall sensor or control PCB is likely defective.
- Resolution: Replace the motor assembly (with integrated sensor) or the control PCB according to DeWalt service documentation.
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Repair Difficulty
Hard
4/5
Required Part
Motor Assembly
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