Gtech Motor Control or Airflow Regulation Issue

Vacuum motor pulses up and down in speed repeatedly instead of running smoothly.

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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 or saturated filters causing fluctuating load, Faulty motor controller PCB, Intermittent battery connection, Failing battery unable to supply steady current

How to Fix / Troubleshooting

Safety first: Remove the battery before cleaning filters or inspecting contacts.

Steps to try:

  • Clean filters and bin: Ensure all filters are clean and dry, and the bin and cyclone are clear.
  • Check battery contacts: Clean the battery and handle contacts with a dry cloth and reseat the battery firmly.
  • Test with another battery: If available, try a second battery to see if the pulsing stops.
  • Service if persistent: If pulsing continues with clean filters and a good battery, the motor controller PCB is likely faulty and the main body will need replacement.
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Repair Difficulty

Hard 4/5

Required Part

Main Motor Assembly
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