Food is consistently undercooked or overcooked compared to recipe times, even when using correct settings.

Safety first: Allow the cooker to cool before internal checks.

• Verify recipe and altitude: Confirm you are following Nesco instructions and adjust for high altitude if necessary.
• Check sealing components: Inspect and replace the sealing ring and float valve gasket if worn; poor sealing reduces pressure and raises cook times.
• Test with water: Run a pressure cycle with a measured amount of water and time how long it takes to reach pressure and release. Compare to manual expectations.
• Sensor issues (advanced): If behavior is erratic, test the NTC sensor resistance at room temperature and compare to specifications. Replace if out of range.
• Board replacement: Persistent regulation issues with good sensors and seals usually require control board replacement.

Warning: Do not attempt to modify pressure settings beyond manufacturer limits.