Alternating 'noPr' and 'Food Burn' messages; cooker struggles to reach pressure and then reports burn.

Safety first: Unplug the cooker and allow it to depressurize.

• Clean and reseat sealing components: Remove, clean, and reinstall the sealing ring, steam release cap, and float valve. Replace the sealing ring if worn.
• Deglaze inner pot: Remove burnt food and clean the pot thoroughly.
• Increase liquid and reduce thickness: Add more thin liquid and avoid very thick mixtures until after pressure cooking.
• Run a water test: Verify that the cooker can reach and hold pressure with only water. If it cannot, inspect the sealing ring and lid assembly for damage.