High-pitched whistling or continuous hissing noise from the lid during pressure cooking.

Safety first: Do not place your face or hands near escaping steam. Allow the cooker to depressurize before adjustments.

• Check valve position: Ensure the steam release valve is turned or set to the correct pressure position.
• Clean valve seat: After cooling, remove the valve and clean the seat and surrounding area to remove food particles.
• Inspect valve seal: Check the silicone or rubber seal on the valve for cracks or hardening. Replace if worn.
• Test again: Run a water-only pressure test. If whistling persists, replace the steam release valve assembly.