Ninja OS401 how to run a first Pressure Cook test with water
Before first use. The guide recommends an initial run to get familiar with pressure cooking.
Steps
- Put the cooking pot in the cooker base and add 3 cups of room-temperature water to the pot.
- Align the arrow on the front of the pressure lid with the arrow on the front of the cooker base, then turn the lid clockwise until it locks into place.
- Make sure the pressure release valve on the lid is in the SEAL position.
- Press the PRESSURE button. The unit defaults to high (HI) pressure and a time of 2 minutes. Press START/STOP to begin.
- Wait while the display shows PRE as pressure builds. The countdown starts when the unit is fully pressurized.
- When the countdown finishes, the unit beeps, switches to Keep Warm mode and begins counting up.
Serious burns can result from the steam and hot foods inside the inner pot. ALWAYS keep hands, face, and other body parts away from the pressure release valve prior to or during pressure release and when removing the pressure lid after cooking.
Marked WARNING by the manufacturer Source: Important Safeguards: item 44, p. 4
- Turn the pressure release valve to the VENT position to quick release. When the steam is completely released, the unit is ready to open. See Release pressure with the quick release.
Before pressure cooking, review and follow all warnings on pages 2 to 5; the guide says failure to follow them increases the risk of a burn.
Source: Familiarizing Yourself With Pressure Cooking Source: Familiarizing Yourself With Pressure Cooking, p. 13
Other OS401 procedures
- How to release pressure with the quick releaseOnly when the recipe calls for it, after pressure cooking is complete and the KEEP WARM light is on.
- How to release pressure naturallyWhen pressure cooking is complete and the recipe does not call for a quick release.
- How to install the pressure lidBefore using the Pressure Cook, Steam, Sous Vide, Slow Cook or Yogurt function.
- How to remove the pressure lidAfter the pressure has been released and the float valve has dropped.
- How to pressure cookWhen a recipe uses the Pressure Cook function.
- How to remove and reinstall the silicone ringTo wash the ring after use or to replace it.
- How to remove and clean the anti-clog capAfter every use, and when checking the valves before cooking.
- How to install and remove the condensation collectorBefore first use, and to hand-wash the collector after each use.
- How to clean the unit after useAfter every use.
Sources
- OS401 Owner's Guide: Foodi 10-in-1 8-QT XL Pressure Cooker. SharkNinja Operating LLC. Document OS401_IB, revision MP_REV_Mv12, 25 pages, en. ninjakitchen.com. Listed on the manufacturer's support page. Retrieved 13 November 2026.
Page numbers are the numbers printed in the manual. Where this page and the manual differ, follow the manual.