How to Fix / Troubleshooting

Safety first: Unplug the unit before inspection.

Isolate source: Run the unit briefly and listen to determine if the noise comes from the brush area or motor area (do not touch moving parts).
Check brushroll: Remove the brushroll and run the motor without it (if safe to do so). If the noise disappears, replace the brushroll assembly.
Inspect belt (if present): Check for glazing, cracks, or misalignment. Replace the belt if worn.
Motor noise: If the squeal persists with the brush removed, the motor bearings may be failing and the motor assembly should be replaced.

Carpet cleaner makes a high-pitched whine or squeal when running

Possible Causes