High-pitched whistling noise and reduced suction

Safety first: Unplug the machine before checking seals and hoses.

• Check tank lid and seals: Ensure the dirty water tank lid is properly closed and the gasket is intact. Replace the gasket if flattened or torn.
• Inspect nozzle and hose: Look for visible cracks or holes. Run your hand along the hose while the machine is running (for brief tests) to feel for escaping air.
• Replace damaged parts: Fit a new hose, nozzle, or gasket where leaks are found.
• Ensure correct assembly: Refit all components firmly until they click into place to maintain a good seal.