Display shows E3 during preheat or cooking; unit stops heating and beeps

Safety first: Unplug the cooker and let it cool completely. Over‑temperature conditions can cause burns and fire risk.

• Check inner pot placement: Ensure the stainless or nonstick inner pot is fully seated and flat on the heating plate. Never operate the cooker without the inner pot.
• Clean the heating plate: Remove the inner pot and gently clean the aluminum heating plate with a soft cloth. Remove any burnt food, sugar, or oil residue that can cause hot spots. Do not scratch the plate.
• Inspect bottom of inner pot: Make sure the bottom is flat and not warped. A warped pot can cause poor contact and localized overheating. Replace the inner pot if deformed.
• Check ventilation: Verify that the side and bottom vents are not blocked by countertops, towels, or other appliances. Provide at least several inches of clearance around the cooker.
• Reset thermal protection (if accessible): Some Cosori models use a manual reset thermostat or thermal fuse on the heating plate. With the unit unplugged and bottom cover removed, look for a small thermostat button; press gently to reset if present. If a thermal fuse is open, it must be replaced.
• Test again: After cleaning and ensuring proper airflow, run a water‑only test (2–3 cups of water) on a low setting. If E3 returns quickly, the thermostat, thermal fuse, or control board may be faulty and should be inspected by a technician.