Vacuum makes a loud high-pitched whine or grinding noise during operation

Safety first: Remove the battery pack immediately if you hear grinding or smell burning. Do not continue to run a noisy motor.

Steps to assess noise source:

• 1. Isolate the handheld unit: Remove the wand and floor head. Run only the handheld unit to see if the noise persists. If it does, the main motor is the source.
• 2. Check for external obstructions: Inspect the air inlet and exhaust vents for foreign objects that may be contacting the fan.
• 3. Listen for bearing noise: A rhythmic grinding or rumbling usually indicates bearing failure, which will worsen over time.

Repair recommendation: Motor bearing or fan damage requires replacement of the complete motor assembly. This involves disassembling the handheld body and should be done by a Hoover Candy service technician.