How do I know if my pressure cooker has sealed properly?

Question

Learn how to check and confirm a complete seal before pressure builds.

Answer 1

You know if your pressure cooker has sealed properly when the pressure indicator (float valve) pops up, or for stovetop models, when the pressure regulator begins to hiss and/or rock steadily, indicating that full operating pressure has been reached.

Detailed Explanation:

Ensuring your pressure cooker has sealed properly is crucial for it to build and maintain pressure effectively. Each type of pressure cooker has distinct indicators:

For Electric Pressure Cookers (like Instant Pots):

• Float Valve: The most common indicator is the small metal pin or 'float valve' on the lid. When pressure builds inside, this pin rises and locks the lid, confirming a seal. Once it's fully popped up, your cooker has sealed and is under pressure.
• Display Message: Many electric models also have a digital display that will show a specific message (e.g., 'On,' 'Heat,' 'Pressure Cook,' or simply a timer counting down) once pressure is reached and locked.

For Stovetop Pressure Cookers:

• Whistling/Hissing Regulator: Once steam starts building, you'll hear a gentle hiss from the pressure regulator (the weight on the vent pipe). As full pressure is achieved, this regulator will either start to hiss continuously, rock gently, or release steam in a steady rhythm, depending on the model. This is your sign that the cooker has sealed and is operating at pressure.
• Red Indicator Pin (some models): Similar to electric cookers, some stovetop models may have a small red pin or indicator that pops up when pressure is reached.

If your cooker is not sealing or building pressure after a reasonable amount of time (e.g., 10-15 minutes on high heat for stovetop, or after the usual preheating cycle for electric), check that the lid is properly aligned and closed, the gasket is seated correctly, and the vent pipe is clear.

Pro Tip:

If your electric pressure cooker's float valve isn't rising after a few minutes, ensure the steam release handle is set to 'sealing' and not 'venting.'