Float valve remains up and the lid cannot be opened long after cooking has finished and heating has stopped.

Safety first: Never force the lid open. Assume the cooker is still under pressure until proven otherwise.

• Wait additional time: Allow at least 20–30 minutes for natural pressure release, especially with thick foods.
• Gently tap float: Using a long utensil, gently tap the side of the float valve to see if it drops. Do not press it down forcefully.
• Check steam release valve: Ensure the valve is in the venting position. If no steam escapes and the float remains up, the vent may be blocked.
• After safe opening, clean thoroughly: Once the lid opens, disassemble and clean the float valve, steam release valve, and anti-block shield to prevent recurrence.

If the float valve mechanism is damaged or continues to stick, replace the float valve assembly.