Pressure cookers generally use a form of liquid like stock, broth, wine, or most generally water to trap the vapor that comes from the liquid in steam form. It follows the same basic principle as an instant pot, but a hissing sound doesn’t mean the food inside the pot is ready. This is a quick way to know when the boiling water in a kettle is ready. In the instance of a tea kettle, it hisses when the steam gets hot enough to carry the lid on the kettle, making it whistle. The hissing sound made by an instant pot is similar to that made with a tea kettle. It has computer chips that keep the temperature and pressure at acceptable levels for the food.Īfter you’ve finished cooking, the instant pot should hiss a little as it’s set to let out the pressure at a rapid pace. Even when it hisses, it’s supposed to be very quiet and almost unnoticeable. Ideally, electric pressure cookers such as instant pots shouldn’t hiss or rattle for long periods. You should get the written guide that came with the pot and start troubleshooting immediately to detect the problem. It may be that the instant pot was not seated properly or something is damaged. However, if the hissing sound continues for a long time, there might be a problem. Yes, it’s completely safe if your instant pot is hissing. As long as you are using it for cooking something, then it’s supposed to kiss. When the pressure builds up, the safety valves open to allow excess pressure to come out, which is sometimes aided by the cooker lid’s rattling. The lid of your instant pot is designed to release the excess seam inside to acceptable levels so the food can cook properly.

Hissing is a normal and expected feature in all pressure cookers, including instant pots.

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