High-pitched whistling noise and reduced suction during operation.

Safety first: Unplug the Philips carpet cleaner.

• Check tank seals: Inspect the dirty tank lid gasket and perimeter seals for cuts or flattening. Replace if compromised.
• Inspect nozzle and joints: Examine the front suction nozzle and joints for hairline cracks. Replace the nozzle if cracked.
• Verify hose connections: Ensure all suction hoses are fully seated on their ports and secured with clamps.
• Test with light pressure: While running (carefully), gently press around the tank lid and nozzle joints. If the whistling changes, you have found the leak area to reseal or replace.