Instant Pot Hissing While Cooking (Is It Normal?)

That strange hissing sound coming from your instant pot can sometimes be terrifying. We’ve seen it all, and understanding why it is hisses will help you handle the problem effectively.

So, why does a pressure cooker hiss?

Whenever an instant pot’s immense pressure becomes substantial, the security pressure relief valve opens to discharge the additional pressure. This release from the pot causes the hissing sound produced by the pressure leaving the instant pot. Instant pots are typically quieter than other types of pressure cookers.

In this article, we will be teaching you everything you need to know about instant pot hissing.


Is it normal for an Instant Pot to make noise?

Instant Pot

Yes. Making noise is expected while using a pressure cooker. The safety release valve, which dynamically regulates the force required by opening and closing, may produce noise and vapor.

Instant pots belong to a distinct category. Except for the pressure release at the end of the cooking cycle, they are silent.

Since the heat and pressure inside the cooker are tightly controlled by computer chips that can maintain temperature and press at very stable levels, electric units don’t hiss, rattle, or whistle throughout the procedure.

Instant pots hiss a little while the cooking process is coming to a finish because the pressure is released more quickly than it would naturally. The noise is not loud and shouldn’t alarm you. It is typical.


How Pressure Cookers Work

Pressure Cookers

Most of the time, equipment wouldn’t frequently make a hissing noise. What, then, qualifies it as a pressure cooker level of quality?

To comprehend why a pressure cooker could hiss, we must start at the very beginning. The steam a pressure cooker produces is contained inside a tight space, which is how it functions. It accomplishes this as the meal within is cooking. The pressure rises as the volume of steam does as well. Through this method, the boiling temperature of the water is elevated above 212 degrees Fahrenheit.


Why Is My Instant Pot Releasing Pressure While Cooking?

Numerous issues can trigger an Instant Pot to release the pressure while preparing food and make loud hissing sounds. If your Instant Pot persists in hissing while cooking or even after the warming trend, this appears to indicate that something must be incorrect with the apparatus.

Another most common complication would have been if the nozzle was not adjusted on the seal and had been on the vent, restricting any vapor from being released and preventing it from adequately inflating the crock pot with vapor. Alternatively, you might discover that the nozzle has to be repaired or replaced. The hissing may occur if the lid’s gasket needs to be replaced.


Why does my instant pot make noise?


1. Your Instant Pot Is Improperly Sealed

properply sealed instant pot

This can occasionally be a plain error if the pressure valve is only partially or entirely closed before cooking. Even though you made sure to seal it thoroughly, it still might have leaked unintentionally.

In addition to the hissing sound, typical symptoms include the instant pot taking a prolonged path to achieve high pressure. Your meal won’t cook quickly since a substantial percentage of the created vapor is expelled through the nozzle.


2. High Pressure in the Instant Pot

As previously mentioned, high cooking pressure can cause your instant pot to hiss. This may occur if your instant pot is tightly sealed and the nozzle is shut before you begin preparing your meals. The hissing noise serves as a warning to the owner that a pressure lowering is required.

When you first switch on your instant pot for pressure cooking, the gadget will generate vapor to prepare the food. In essence, the liquid within is heated to a simmer to produce steam, which is then forced into the pressure cooker. Whenever this process is underway, hissing may happen. It generally lasts 5 to 10 minutes, whereas the liquid within is approaching boiling temperature, and then it will cease once the temperature and steam level have achieved their goals.


3. Insufficient Liquid in Instant Pot

Insufficient Liquid in Instant Pot

When you first switch on your instant pot for pressure cooking, the gadget will generate vapor to prepare the food. In essence, the liquid within is heated to a simmer to produce steam, which is then forced into the pressure cooker.

Whenever this process is underway, hissing may happen. It generally lasts 5 to 10 minutes, whereas the liquid within is approaching boiling temperature, and then it will cease once the temperature and steam level have achieved their goals.

You should thin out liquid items like tomato sauce with water or stock before cooking them for optimal outcomes because they are very dense.


4. The Sealing Ring or Gasket is not appropriately seated.

Cooking takes longer when a sealing ring is incorrectly positioned, allowing steam from the cooker to break away. Your instant pot is not configured correctly if you cannot turn the rings around the closure column.

This may cause steam to flow from your lid’s sides, producing a hissing sound. You can quickly determine by carefully inspecting the edges to verify if the locking band is present.


Different Types of Noises from an Instant Pot


Hissing Sound

Steam is piling up when there is a hissing sound. It is entirely typical. The hissing will eventually stop, signifying a complete seal, after some time.


Beeping Sound

When you press any button on an instant pot, you may hear a certain type of beeping sound. This sound is typical and is easily deactivated.


Rattling Sound

An instant pot is a very reliable appliance. Normal shaking and rattling don’t occur. It’s a sign that something is awry when the instant pot starts to tremble or rattle.

When internal pressure builds up to a dangerous level, an instant pot begins to tremble.


How To Stop An Instant Pot From Hissing

The strategies to prevent your instant pot from hissing are listed below.


1. Checking Properly Before Cooking

A protocol must be followed whenever you wish to use your instant pot for cooking. Verify the valves and the integrity of the seal.

Additionally, carefully check the cover to ensure no issues between it and the lower portion of your instant pot.


2. Reduce the Temperature

The pressure cooker will stabilize through a process that is as simple as reducing the heat on stovetop heaters. Nevertheless, it takes a while for the warmth to be lowered and the components to decrease in electric cookers, much like pressure cookers.


3. Add Appropriate Liquid to Your Instant Pot.

A more significant amount of liquid may be required in your instant pot for some foods and recipes. If you want the instant pot to function at its best, consider adding additional broth or water.

Using the sautéed option will cause the liquids to diminish and the ingredients to thicken if your finished meal is too liquid or thin. As a replacement, you can use thickening agents like semolina, cornflakes, and cornmeal.


4. Don’t Overfill Your Instant Pot

A pressure cooker that has been overfilled will lose flavor and texture, among other things. The high pressure brings this on that the surplus of liquid creates. Food becomes ruined by excessive pressure.

In terms of dangers, food may block the pressure valve if the pot is loaded to the brim. The risk of excessively high-pressure levels increases if the pressure release valve is closed. The lid can no longer control pressure, increasing to dangerous levels if the safety valve cannot vent effectively.


5. Fit the Sealing Ring in Properly

If the sealed band is not positioned correctly and steam is hissing out of the corners, you can reposition it. When the sealing ring is seated correctly and there is no more room to view, unlock the instantaneous pot and slide it around the circular tray.

The ring can be rotated around the ring rack to verify. If you have to use the same amount of force to turn it around the ring rack as you did to push it, it is positioned correctly. Try positioning it again if it doesn’t rotate the first time correctly.


Can A Hissing Instant Pot Explode?

instant pot hissing sound

The most straightforward yet most encouraging response to this query is NO. If you hear your instant pot hissing, it won’t explode. So you can unwind and stop worrying about it. This is because they have almost 10 safety features that are explicitly designed to protect them from such occurrences.

These occurrences include close lid detections, leaky lid protection, anti-blockage rant and rave, temperature sensors, elevated alerting, cover lock under tension, fully automated pumping systems faced with pressure safeguards, temperature extremes, authority safeguards, and set pressure defense.

The instant cookers’ safety precautions are designed to keep them from working irresponsibly. The quick pot will immediately halt or automatically lower the tensile stresses if something improbable occurs.


Is It Safe If Instant Pot Is Hissing?

Yes, an instant pot is completely safe if it is hissing. Although, if the hissing sound persists for a long time, there could be a problem. It’s possible that anything went wrong with your instant pot or you didn’t correctly seat it. You may be able to identify and resolve the problem using the printed instructions included with the instant pot.

The instant pots should, in principle, not hiss, rumble, or produce noise for extended periods. Even if it hisses, it ought to be so faint as virtually undetectable. This is credited to the chips inside, which keep the instant pot’s internal static pressure at “meals” levels. Since it is designed to relieve the pressure quickly after heating is accomplished, the instantaneous pot may hiss a little bit.


How Do I Know If A Pressure Cooker Is Sealed?

Two observable indications indicate a real problem. The initial sign would be steam emerging from the lid. But this symptom is followed by another.

Your cooking time will likely be longer if steam comes off the cover. What period would suggest a problem? The cooker should generally be set up in no more than 45 minutes. Anytime the cooking time exceeds 45 minutes, the pressure cooker’s seal has failed. Or perhaps it was unable to shut. The float valve is involved in the other situation that you can experience.

If the float valve does not open when the instant pot cook cycle starts, the pot has not sealed. When other parts of the machine have problems, this problem also arises. Something is missing in other instances. Here is a list of every potential problem to address:

  • The steam release lever is in the venting position.
  • The lack of liquid in the pot causes food to become trapped at the bottom and creates pressure.
  • The float valve is not present.


If none of the above-mentioned issues apply to you, there are several straightforward situations in which your pressure cooker won’t seal. The food you’re planning to cook’s temperature is the first problem. Cold weather will cause the pressure to build more slowly.

The amount of food is the next item on the list. It would also take longer to become under strain if you planned to prepare a lot. Consequently, the pressure cooker won’t seal for as long.

Finally, check to see that the power cord is securely fastened. If so, fully plug it in to ensure it has enough power.


Is The Pressure Release Valve Supposed To Be Loose?

The components of the majority of machines will be firmly fixed. When there is sufficient pressure, this will become more stable. When using pressure cookers, you may observe that the stress discharge valve appears slack. Do you think that’s how it should be? Many people think it’s a purposeful design choice.



The noises might be especially troubling when you are unclear of their origin. Pressure cookers hiss a lot, as we now know. You shouldn’t be alarmed if your instant pot makes noise periodically. It happens all through the meal preparation process. Certain circumstances allow for it.

However, you should be concerned if the hissing sounds strange or lasts too long. This would be perfect if you were searching for damaged or imperfect items. The suggestions given above can help you figure out why your instant pot is hissing and fix the issue.

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