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Quick answer
If steam escapes from the side of the lid, or the float valve never pops up, the pot can't build pressure. Instant Pot's manual lists eight causes, and most of them come down to the sealing ring and the parts it touches. Go through the list before you buy anything. When the ring is the problem, the fix is cheap.
Genuine Instant Pot sealing rings, by pot size:
Instant Pot 3 Qt Sealing Ring Instant Pot 4, 5 & 6 Qt Sealing Ring Instant Pot 8 Qt Sealing RingWhere an Instant Pot leaks
Steam leaking from the side of the lid: causes and fixes
| Cause (from the Instant Pot manual) | Fix |
|---|---|
| No sealing ring installed | Install the ring. |
| Ring damaged, stretched, or not installed properly | Reseat it (see how to install the ring). If it's cracked, cut or deformed, replace it. |
| Food debris on the ring | Remove and clean the ring. |
| Lid not closed properly | Open the lid and close it again. |
| Ring rack warped or off-center | The rack should be secured, centered and even. Don't try to repair a deformed rack. Contact Instant Pot Customer Care. |
| Inner pot rim misshapen | Set the inner pot upside down on a flat surface. Instant Pot's FAQ says the rim should sit flush, and a warped pot should be replaced. |
| Food debris on the float valve or its silicone cap | Clean the float valve and cap, and make sure the cap is attached and undamaged. |
| Not enough liquid | The manual's minimums: 1 cup for a 3 L pot, 1½ cups for a 5.7 L (6 qt) pot, 2 cups for an 8 L pot. |
Float valve won't pop up
The manual says this happens when the float valve's silicone cap is damaged or missing, or when debris keeps the valve from moving. Also check that the steam release is turned to Sealing. Instant Pot's FAQ lists that as one of the first checks.
What's normal
The manual says minor steam or hissing from the steam release handle during the cook cycle is normal: the cooker is letting off excess pressure. That's different from steam escaping around the edge of the lid, which points to the ring.
If steam keeps leaking for more than 3 minutes, stop. Instant Pot's FAQ says to record a short video, then turn the appliance off and unplug it from the wall before working through the checks above. Contact Instant Pot Customer Care if it keeps happening.
How we work: the causes and fixes on this page come from Instant Pot's FAQ and user manual. A Reddit thread showed how often owners run into this problem. Sources are listed below.
Questions people ask
Why is steam leaking from the side of my Instant Pot lid?
The Instant Pot manual lists causes like a missing, damaged or dirty sealing ring, a lid not closed properly, or a warped ring rack or inner pot rim.
Is some hissing normal on an Instant Pot?
Yes. The manual says minor steam or hissing from the steam release handle during the cook cycle is normal.
How much liquid does an Instant Pot need to seal?
The manual's minimums are 1 cup for a 3 L pot, 1½ cups for a 5.7 L (6 qt) pot, and 2 cups for an 8 L pot.
Sources
Last checked Oct 23, 2026. Instant Pot says third-party sealing rings may void the warranty. Check your own model's manual before cooking.
