The lid is stuck and will not open after cooking; the float valve appears to be up.

Safety first: Never force the lid open. Risk of severe burns.

• Check pressure: Ensure the steam release valve is in the venting position. Wait until no more steam escapes and the float valve drops.
• Gently tap float: Using a wooden spoon, gently tap around the float valve to free it if stuck by dried food.
• After opening: Once safe to open, remove and clean the float valve and its silicone seal thoroughly.
• Replace seal: If the seal is swollen or deformed, replace it with a new one.