Display shows a pressure-related message (e.g., "PRSS" or flashing pressure icon) and the cooker will not open or start a new cycle.

Safety first: Never force the lid open while the cooker indicates pressure. Serious burns can result.

• Verify vent position: Ensure the steam release knob or lever is in the "Vent" position to allow pressure to escape.
• Wait for float valve to drop: Observe the float valve; only attempt to open the lid once it has fully dropped.
• Clean vent components: After the unit is cool and open, remove and clean the steam release valve, anti-block shield, and float valve to ensure free movement.
• Test again: On the next use, confirm that pressure builds and releases normally. If the cooker continues to think it is under pressure when it is not, the pressure sensor may be faulty.