E8
Vax Motor Speed Sensor / Tachometer Fault

Cordless Vax vacuum displays “E8” or a motor icon with a fault symbol; motor may pulse or fail to reach full speed.

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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 motor speed sensor on the main motor, Damaged wiring between motor and control PCB, Debris or damage affecting motor fan rotation, Failing main suction motor bearings

How to Fix / Troubleshooting

Safety first: Remove the battery before any inspection. Do not insert objects into the motor vents.

  • 1. Check for severe blockages: Ensure the bin, cyclone, wand, and floorhead are clear. A heavily loaded motor can misreport speed.
  • 2. Listen to the motor: With the vacuum reassembled and battery fitted, briefly run the unit. If the motor surges, squeals, or grinds, internal motor damage is likely.
  • 3. Inspect vents: Check that the motor cooling vents are not blocked by dust. Clean gently with a soft brush.

Because the speed sensor is integrated with the motor assembly on most Vax cordless models, an E8 fault usually requires replacement of the complete motor housing or main body assembly. This is an advanced repair and should be done by a service centre.

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Repair Difficulty

Professional Required 5/5

Required Part

Main Suction Motor Assembly
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