Ninja Foodi 10-in-1 8-qt XL Pressure Cooker

Category: Multicookers and pressure cookers
Model number: OS401
Region: North America
Manual: OS401_IB revision MP_REV_Mv12
Verified: 13 November 2026
Rating label: On the QR code label on the back of the unit, by the power cord. The label shows the model and serial numbers. Source: OS401 Owner's Guide: Foodi 10-in-1 8-QT XL Pressure Cooker, p. 1

Error codes

Code	Meaning	Checks
ADD POT	The cooking pot is not inside the cooker base.	Checks
LID	The LID message appears with a flashing lid icon.	Checks
SHUT	The crisping lid is open.	Checks
WATR	The WATR message appears with the Steam function or the Pressure function.	2 causes
HOT	The unit has overheated.	Checks
ERR	The unit is not functioning properly.	Checks
PRE	The unit is building pressure or preheating while the Pressure or Steam function runs.	Checks
ADD FOOD	Sous Vide preheating is complete.	Checks
BOIL	The unit is pasteurizing the milk.	Checks
COOL	The milk has reached the pasteurization temperature.	Checks
ADD AND STIR	The milk has cooled and the yogurt cultures can be added.	Checks
DONE	The yogurt incubation time is complete.	Checks

Ninja codes on other models

ADD POT

ADD POT. The cooking pot is not inside the cooker base.

Put the cooking pot in the cooker base.

Source Source: Troubleshooting Guide: "ADD POT" error message, p. 23

LID

LID. The LID message appears with a flashing lid icon.

Put the pressure lid on the unit to use the Pressure, Slow Cook, Steam, Sear/Sauté or Keep Warm function. See Install the pressure lid.
Make sure the lid is in the closed position.

Source Source: Troubleshooting Guide: "LID" error message, p. 23

SHUT

SHUT. The crisping lid is open.

Close the crisping lid.

Source Source: Troubleshooting Guide: "SHUT" error message, p. 23

HOT

HOT. The unit has overheated.

Let the unit cool down.
Once the unit has cooled down, make sure there is no food caked on the bottom of the pot and that the pot holds enough liquid for the recipe you are preparing.

Source Source: Troubleshooting Guide: "HOT" error message, p. 23

ERR

ERR. The unit is not functioning properly.

SharkNinja Customer Service Contact Customer Service at 1-877-646-5288. Contact: 1-877-646-5288 or ninjakitchen.com/support.

Source Source: Troubleshooting Guide: "ERR" message, p. 23

PRE

PRE. The unit is building pressure or preheating while the Pressure or Steam function runs.

Source Source: Troubleshooting Guide: The word PRE appears on the display, p. 22

ADD FOOD

ADD FOOD. Sous Vide preheating is complete.

Remove the pressure lid and place the bags in the water using the water displacement method: lower one bag at a time with a corner left unzipped, so the water pressure forces the air out of the bag. When the bag's seal is just above the water line, finish closing it so no water gets inside, and keep the seal just above the water line.
Reinstall the pressure lid and make sure the pressure release valve is in the VENT position. See Install the pressure lid.

Source Source: Using the Cooking Functions with the Pressure Lid: Sous Vide, steps 5 to 7, p. 17

BOIL

BOIL. The unit is pasteurizing the milk.

Source Source: Using the Cooking Functions with the Pressure Lid: Yogurt, step 6, p. 19

COOL

COOL. The milk has reached the pasteurization temperature.

Source Source: Using the Cooking Functions with the Pressure Lid: Yogurt, step 6, p. 19

ADD AND STIR

ADD AND STIR. The milk has cooled and the yogurt cultures can be added.

Remove the pressure lid and skim the top of the milk.
Add the yogurt cultures to the milk and stir to combine.
Install the pressure lid, with the valve in VENT or SEAL, and press START/STOP to begin the incubation process.

Source Source: Using the Cooking Functions with the Pressure Lid: Yogurt, steps 7 to 9, p. 19

DONE

DONE. The yogurt incubation time is complete.

Chill the yogurt for up to 12 hours before serving.

Source Source: Using the Cooking Functions with the Pressure Lid: Yogurt, steps 10 and 11, p. 19

Problems

The unit takes a long time to come to pressure3 causes in the manual. First: the time to build pressure varies with the selected temperature, the current temperature of the cooking pot, and the temperature and quantity of the ingredients.
The time is counting down slowly2 causes in the manual. First: hours were set instead of minutes. While you set the time, the display shows HH:MM and the time changes in minute increments.
The pressure lid will not come off2 causes in the manual. First: the unit is not completely depressurized. As a safety feature, the pressure lid will not unlock until it is.
The unit is hissing and not reaching pressure2 causes in the manual. First: the pressure release valve is not in the SEAL position.
The unit takes a long time to depressurizeThe release time depends on the quantity of food in the unit and varies from recipe to recipe.

The unit takes a long time to depressurize

The release time depends on the quantity of food in the unit and varies from recipe to recipe. Source: Troubleshooting Guide: How long does the unit take to depressurize?, p. 22

Check that the float valve has dropped before you try to remove the lid.
If depressurizing takes longer than normal, unplug the unit and wait until the float valve drops before interacting with the product.

A lot of steam comes from the unit when using the Steam function

It is normal for steam to release through the pressure release valve during cooking. Source: Troubleshooting Guide: There is a lot of steam coming from my unit when using the Steam function, p. 22

The pressure release valve is loose

The valve's loose fit is intentional. It allows a quick transition between SEAL and VENT and regulates pressure by releasing small amounts of steam during cooking. Source: Troubleshooting Guide: Is the pressure release valve supposed to be loose?, p. 22

The unit is counting up instead of down

The cooking cycle is complete and the unit is in Keep Warm mode. Source: Troubleshooting Guide: The unit is counting up rather than down, p. 22

How-to

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 run a first Pressure Cook test with waterBefore first use. The guide recommends an initial run to get familiar with pressure cooking.
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.

Maintenance

Task	When	Source
Clean the unit	After every use	Source: Cleaning & Maintenance, p. 21
Clean the anti-clog cap with a cleaning brush	After every use	Source: Before First Use: Removing & Reinstalling the Anti-Clog Cap, p. 9
Check the pressure release valve and float valve for clogging or obstruction	Before each use	Source: Important Safeguards: item 14, p. 2
Check that the silicone ring is well seated in the silicone ring rack and the anti-clog cap is mounted properly on the pressure release valve	Before each use	Source: Before First Use: Note, p. 9
Remove food debris from the silicone ring and anti-clog cap	After use	Source: Cleaning & Maintenance: Removing & Reinstalling the Silicone Ring, p. 21
Replace a silicone ring that has cracks, cuts or other damage	Immediately when damaged	Source: Cleaning & Maintenance: Removing & Reinstalling the Silicone Ring, p. 21
Hand-wash the condensation collector	After each use	Source: Before First Use: Installing the Condensation Collector, p. 9
Inspect the pressure lid to make sure no debris is blocking the valves	Before first use	Source: Before First Use: step 3, p. 9

Settings

Setting	Options	Default	Notes	Source
Pressure level	HIGH or LOW, selected with the TEMP arrows	HI	The first Pressure Cook test run in the guide uses the HI default and a 2-minute time.	Source: Using the Cooking Functions with the Pressure Lid: Pressure Cook, step 3, pp. 13, 15
Keep Warm	Turns on automatically after pressure cooking, steaming or slow cooking; press KEEP WARM to turn it off		Stays on for 12 hours and counts up.	Source: Using the Control Panel: Function Buttons, p. 8
Yogurt or ferment	Yogurt (pasteurize, cool, add cultures and incubate) or FMNT (ferment only); press and hold the SLOW COOK/YOGURT button, then use the TEMP arrows to select Yogurt or ferment		FMNT skips the pasteurizing and cooling steps for milk that is already pasteurized and cooled.	Source: Using the Cooking Functions with the Pressure Lid: Yogurt, p. 18

Parts and consumables

Item	Replace or refill	Specification	Source
Silicone ring	–	Reversible and fits with either side facing up. Use only SharkNinja silicone rings. Replace it if it has cracks, cuts or other damage. A 2-pack of extra rings is sold at ninjaaccessories.com.	Source: Cleaning & Maintenance; Additional Accessories Available for Purchase, pp. 2, 20, 21
Replacement parts and accessories	–	Order from ninjaaccessories.com or through Customer Service at 1-877-646-5288.	Source: Replacement Parts, p. 24

Specifications

The Owner's Guide covers model OS401. The control panel has PRESSURE, STEAM, SOUS VIDE, SLOW COOK/YOGURT, SEAR/SAUTÉ, AIR CRISP, BAKE/ROAST, BROIL, REHEAT, DEHYDRATE and KEEP WARM buttons. Source: Using the Control Panel, p. 8

Two lids share one base. The hinged crisping lid is used for Air Crisp, Bake/Roast, Broil and Dehydrate, and the pressure lid for Pressure, Steam, Sous Vide, Slow Cook and Yogurt. Source: Using Your Foodi 8-QT XL Pressure Cooker: The Crisping Lid and the Pressure Lid, pp. 10, 15

Electrical rating	120V~, 60Hz, 1760W	Source: Technical Specifications, p. 1
Model and serial number location	On the QR code label on the back of the unit, by the power cord	Source: Record This Information (Tip), p. 1
Cooking pot	8-quart removable cooking pot. A cooking pot is required for all functions	Source: Parts & Accessories; Troubleshooting Guide, pp. 6, 23
Fill limits	Pressure Cook: at least 1/2 cup of liquid and no higher than the PRESSURE MAX line; foods that expand, such as rice and beans, no more than halfway. Slow Cook: no higher than the MAX line	Source: Using the Cooking Functions with the Pressure Lid: Pressure Cook; Slow Cook, pp. 15, 18
Empty pot	Do not heat the empty cooking pot for more than 10 minutes, which may damage the cooking surface	Source: Important Safeguards: item 6, p. 2
Cool-down before handling	Let the appliance cool for approximately 30 minutes before handling, cleaning or storing	Source: Important Safeguards: item 50, p. 5
Pressure release valve position by function	SEAL when pressure cooking. VENT for Steam, Slow Cook and Sear/Sauté	Source: Troubleshooting Guide: There is a lot of steam coming from my unit; Is the pressure release valve supposed to be loose?, p. 22
Pressure lid lock	The lid locks as the unit pressurizes and will not unlock until the pressure is released. The lid pressure icon light glows steadily once the unit has reached full pressure	Source: Pressurizing, p. 14
Crisping lid	Hinged to the unit; it can be opened during any convection cooking function. Opening it stops cooking, pauses the timer and turns off the heating element in the lid. Closing it resumes cooking and the timer	Source: Using the Crisping Lid, p. 10
Anti-clog cap	Protects the inner valve of the pressure lid from clogging and protects users from potential food splatters	Source: Before First Use: Removing & Reinstalling the Anti-Clog Cap, p. 9
Keep Warm	Starts automatically after pressure cooking, steaming or slow cooking, and counts up. It stays on for 12 hours unless you press KEEP WARM to turn it off. It is not meant to warm food from cold	Source: Using the Control Panel: Function Buttons, p. 8
Standby mode	After 10 minutes with no interaction with the control panel, the unit enters standby mode	Source: Using the Control Panel: Standby Mode, p. 8
Switching from pressure cooking to the crisping lid	Empty the pot of any remaining liquid for the best crisping results	Source: Helpful Tips, p. 24
Setting time faster	Press and hold the TIME up or down arrow	Source: Helpful Tips, p. 24
Parts	Nesting Reversible Rack, Cook & Crisp Plate, 8-Quart Removable Cooking Pot, Crisping Lid, Heat Shield, Control Panel, Cooker Base, Pressure Lid, Pressure Release Valve, Float Valve, Silicone Ring, Anti-Clog Cap, Air Outlet Vent, Condensation Collector	Source: Parts & Accessories, p. 6
Accessories sold separately	Cook & Crisp Layered Insert, Skewer Stand, Multi-Purpose Pan, Roasting Rack Insert, Dehydrating Rack, Loaf Pan, Crisper Pan	Source: Parts & Accessories, p. 7
Warranty	One-year limited warranty from the date of purchase; wearable parts such as the removable pot, silicone ring, lids, racks, baskets and plate are not covered	Source: One (1) Year Limited Warranty, p. 25

Recalls

No exact-model match for OS401 in the U.S. Consumer Product Safety Commission recall database, checked 13 November 2026. Recalls can name model families, so also check current recalls for Ninja.

Service contact

SharkNinja Customer Service: 1-877-646-5288, ninjakitchen.com/support. North America. Source: Troubleshooting Guide; Warranty, pp. 23, 25

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.

Applies to: OS401. North America.
Source: OS401 Owner's Guide: Foodi 10-in-1 8-QT XL Pressure Cooker, OS401_IB revision MP_REV_Mv12
Last verified: 13 November 2026

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