Display shows “PRHE” or extended “Preheating” and never transitions to the main cook time.

Safety first: If steam is venting continuously, keep hands and face away from the steam path.

• Observe steam: If you see constant steam from the lid edges or valve, there is a leak. Cancel the program and allow the cooker to cool.
• Check gasket and valves: Inspect and clean the sealing ring, steam release valve, and float valve. Replace the gasket if it is stiff or cracked.
• Add liquid: Ensure you have at least the minimum recommended water or cooking liquid.
• Retry: Run a water-only test to see if the unit can reach pressure within a reasonable time.

If preheating remains excessively long with no visible leaks and adequate liquid, the pressure sensor or control board may be at fault.