People are using Instant pots or pressure cookers for quick and convenient cooking. Sometimes you may be worried about hearing hissing coming out from your instant pot, isn’t it? Maybe or not.

But why is my Instant Pot hissing while cooking? Generally, an Instant Pot or pressure cooker should hiss while cooking. But hissing occurs only when the pressure is too high inside the cooker. Then the cooker will vent this pressure.

One thing also makes you wonder, should a pressure cooker leak steam? Yes, pressure should leak steam while cooking. Although it may be terrifying. It happens when boiling water inside the cooker. And then create pressure.

Do you want to know more? So, don’t stay here! Just Keep reading to know all the facts about the hissing and leaking steam of the Instant Pot.

Is It Normal For Pressure Cookers To Hiss?

Yes, it is quite normal for a pressure cooker or instant pot to hiss. A sealed lid is used to build up pressure and steam in the pot of the pressure cooker.

The sound of the hissing is the result of steam releasing from the lid. When this occurs, the temperature initiates to rise inside the pot. And the pressure also builds up.

But when should you stop the hiss? The hissing noise of the cooker should stop at a specific time when the inside pressure reaches the predetermined point. For a maximum modern pressure cooker or instant pot, you should set the level of the desired pressure.

The loudly hissing pressure cooker implies the pressure is too high inside the pot. Again, it also means that there isn’t sufficient liquid in the pot. In this case, you have to add extra liquid or lower the pressure of the instant pot.

why is my pressure cooker releasing steam

Why Is Your Instant Pot Hissing While Cooking: 5 Reasons

The primary reason is that the seal of the Instant Pot isn’t closed appropriately or fully. The other reason is that an improper seal may remove the steam valve open by chance.

When the cooker isn’t properly sealed, it can’t regulate the needed pressure. As a result, you won’t ensure that the food is being cooked completely. By testing the steam valve, you can indicate whether or not the cooker is sealed appropriately. Then you can assure it is locked.

Besides, you should check the area around the lid and the bottom of the utensil. Thereby, you can ensure whether or not there is anything between the lid.

The secondary reason occurs when the pressure inside the cooker is too high. When the cooker begins to hiss, you will understand the pressure has been too high. If this appears, that means the cooker has been sealed properly.

And then, the valve will close upon the start of the cooking process. Perhaps, this is the reason behind the pressure cooker hissing.

If you want to diminish the pressure, there are two ways you can do it. First, if you have a stovetop, reduce the fire that provides heat. It will rapidly impact the Instant Pot.

On the other hand, if you are using an electric stove top, it won’t be easy to reduce the heat. In this case, you can use two heating components instead of one while using a pressure cooker. One will help to build up the pressure inside the cooker. The other will reduce the temperature to a simmer if needed.

There are several reasons why an Instant Pot might hiss:

  1. Venting: The Instant Pot releases pressure through the vent to maintain a safe and stable pressure level inside the pot.
  2. Overpressure: The Instant Pot has exceeded the safe limit, causing the pressure relief valve to release pressure through the vent.
  3. Sealing: The Instant Pot or pressure cooker is trying to create a tight seal between the lid and the pot to build up pressure.
  4. Liquid boiling: The liquid inside the pot is boiling and producing steam, which is being released through the pressure relief valve.
  5. Food: Certain foods, such as beans and grains, can release gases as they cook, causing the pressure relief valve to hiss.

Is your pressure cooker won’t build any pressure? Well, if your pressure cooker isn’t building pressure, try these fixes.

Should Steam Come Out of Instant Pot While Pressurizing?

Yes, the Instant Pot needs to leak some steam while cooking. Because the liquid boils inside the pot resulting in-built pressure, this leak is very minimal. When the pressure automatically reaches the released steam by the vent by shoving the weight up.

Let me clarify a little better about releasing pressure. The pressure cooker’s lids are built to release steam to sustain the safe level of pressure inside the pot. The safety valve releases the excess pressure through steam.

It will occur only when the pressure inside the cooker is too high. And this time, the cooker makes a hissing sound and lets out the steam.

So, should a pressure cooker release steam during the cooking process? Yes, a pressure cooker should release steam while cooking.

instant pot leaking steam while cooking

Why Is Your Instant Pot Leaking Steam?

Is your instant pot leaking steam while cooking? Unfortunately, sometimes the steam can leak out and create a mess in your kitchen from your instant pot or pressure cooker.

If it happens to you, you should take steps to stop the steam from leaking. There is some reason for the leaking steam of the pressure cooker:

  • The lid isn’t properly closed
  • Incorrect gasket position
  • The lid of the cooker misaligned or bent the gasket
  • Expanded gasket and too loose
  • Blown safety valve and replace it
  • Incorrect closing of handles during locking of the pressure cooker
  • The cocked or out-of-shape lid of the pressure cooker
  • Incorrect whistle position of the steam vent
  • Too much fluid inside the pressure cooker

Read More: When Is It Safe To Open Instant Pot? Beginner’s Guideline

Should Pressure Cookers Make Noise?

Yes, usually, a pressure cooker should make some noise. This is the clue the pressure cooker is working normally. A little whistling or hissing noise means that the steam from the pressure cooker is being released. This is very important for a proper cooking process.

Instead, if sounds are not heard, that means the pressure cooker doesn’t reach the needed pressure to finish the cooking. So, if the pressure cooker doesn’t make a noise, you have to check the sealing ring is in the right place.

Besides, make sure that the lid is suitably placed on the cooker. And so that the overall settings are correct along with all the knobs.

After applying these steps, if your cooker is not making a sound, you should contact a professional for an examination.

Frequently Asked Questions [FAQ]

Does A Pressure Cooker Explode while Steam Release?

No, as long as the safety valve works properly and the lid is tightly closed. The safety valve allows excess pressure to escape, so the pressure cooker can become dangerous or explode if it becomes blocked or faulty.

To avoid this, you should always keep the lid on tightly when using a pressure cooker and check the safety valve regularly to ensure it is in good working perfectly.

How Long Should Instant Pot Hiss?

Usually, the Instant Pot hissing should last around 5-10 minutes while cooking. During this hissing time, the liquid inside the cooker reaches the boiling point.

And then create steam from that boiling fluid. After that, it reaches a peak steam level and heat. Then it will end.

Do Electric Pressure Cookers Hiss?

Yes, electric pressure cooker hiss. Both electric and stovetop pressure cookers hiss while releasing pressure. This sound doesn’t indicate anything wrong with your cooker unit. The electric pressure cooker makes quite a normal hiss sound.

How long does Instant Pot hiss?

An Instant Pot or pressure cooker should make a hissing sound only when the safety valve opens to release extra pressure from inside the cooker. Per sound will stabilize for around 5-6 seconds.

Is It Normal For Electric Pressure Cookers To Hiss?

No, it isn’t normal for an electric pressure cooker to hiss. This cooker is silent save in the case of releasing pressure. It occurs at the end of the cooking process.

Electric pressure cookers generally don’t create whistles or hiss throughout the cooking process because the chips maintain the pressure and heat inside the cooker.

Sometimes, this cooker will hiss slightly at the end of cooking. The release of pressure is programmed prior at a faster rate than normal release. This noise is not so much.


So, at the end of the discussion, there is no doubt that the hissing of the Instant Pot or pressure cooker gives a positive alert.

And leaking steam also occurred for a few reasons. Both cases are related to the excess pressure inside the cooker that needs to be released for better cooking.

But it may be a deeper issue when the steam releases excess and doesn’t stop. Then you will need to settle by taking the immediate right action. So, I think you aren’t confused about the hissing of an Instant Pot.

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