RELATED: A Clear Breakdown of the Differences Between an Instant Pot, Pressure Cooker, Slow Cooker, and Crock Pot On the other hand, you need some amount of liquid for steam (and therefore pressure) to build. Forget to add a sufficient amount and you’ll likely get the unfortunate “Burn” error. RELATED: 4 Delicious Anti-Inflammatory Recipes to Make in Your Instant Pot