Vacuum runs but there is a whistling sound near the handle and reduced suction at the nozzle.

Safety first: Remove the battery before inspecting the handle.

• Check joints: Ensure the handheld unit locks firmly into the wand with no visible gaps.
• Inspect for cracks: Look closely at the handle and connection area for hairline cracks.
• Inspect O-rings/gaskets: Replace any flattened or torn seals at the handle-to-wand connection.
• Temporary test: While running, gently press tape around suspected leak areas to see if suction improves, confirming the leak location.

Permanent repair requires replacing cracked housings or seals.