Multicooker heats but will not build pressure; steam constantly escapes from the lid area during pressure cooking.

Safety first: Allow the cooker to cool and fully depressurize before opening the lid.

• Clean sealing surfaces: Remove the sealing ring and wash it with warm soapy water. Clean the lid groove and the top rim of the inner pot. Dry thoroughly.
• Inspect sealing ring: Check for cracks, hardening, or permanent deformation. If the ring is loose in the groove or shows damage, replace it with a genuine Nesco sealing ring.
• Check steam release valve: Ensure the valve is correctly installed and set to the sealing position. Clean any food residue from the valve and its seat.
• Examine pot rim and lid: Look for dents or warping on the inner pot rim and cracks in the lid. Replace damaged components.
• Test with water: Run a short pressure cycle with only water and observe for leaks. A properly sealed cooker should emit only minimal steam during pressurization.

Warning: Do not apply grease or oil to the sealing ring; this can degrade the silicone and compromise safety.