Symptoms
- Steam or hissing visible around the edge of the lid
- Weaker pressure buildup than usual
- Longer cooking times needed to reach pressure
- Sealing ring looks flattened, cracked, or misshapen
Likely causes
- CommonWorn or damaged sealing ringSilicone rings lose their shape and elasticity after repeated use and heat cycling, typically needing replacement every 12–18 months with regular use.
- CommonSealing ring installed incorrectly or twistedThe ring must sit evenly in its rack without folds or twists.
- CommonLid not fully locked into placeA partially locked lid won't seal properly around the rim.
- PossibleFood debris on the sealing ring or rimResidue can create small gaps that let steam escape.
- Less commonUsing the wrong sealing ring size for the potRings are sized to specific pot capacities and aren't interchangeable across sizes.
What to do
- Remove the lid and inspect the sealing ring for flattening, cracks, stretching, or an odor that won't wash out (often from cooking strong-smelling foods).
- Reseat the ring in its rack, making sure it lies flat and even all the way around with no twists.
- Clean both the ring and the rim of the pot where the lid seals, removing any dried food.
- Make sure the lid is turned to fully locked, aligning with the lock marking, not just resting on top.
- Confirm you're using the correctly sized ring for your specific pot model and size.
- If steam still leaks from the lid after confirming a clean, correctly seated, undamaged ring, replace the ring, since it's a wear item designed to be swapped periodically.
Tools and parts
Instant Pot / pressure cooker sealing ring replacementSearch: “instant pot sealing ring replacement”
When to call a pro
This is a simple wear-part replacement; no professional is needed.
Safety
Use caution
Let the pot cool and depressurize fully before removing the lid to inspect the sealing ring; don't reach near the steam valve during a cook cycle.