Multicooker beeps and shows E1 shortly after starting a program; heating does not begin.

Safety first: Unplug the multicooker and allow it to cool completely before inspection.

• Remove and inspect the inner pot: Take out the cooking pot and clean the base plate and central sensor area with a soft cloth. Ensure no burnt food or liquid is trapped around the sensor boss.
• Check for visible damage: Look at the metal temperature sensor post in the center of the heating plate (if visible). It should be firmly seated and not bent or loose.
• Access the bottom panel: With the unit unplugged, remove the screws on the underside and carefully lift off the bottom cover to expose the main NTC sensor and wiring.
• Inspect NTC wiring: Locate the small two-wire harness from the sensor to the main control board. Check for cuts, burns, or loose connectors. Reseat the connector on the PCB.
• Test continuity (advanced): Using a multimeter set to resistance, measure the NTC sensor. A typical NTC will show several kilo-ohms at room temperature. An open circuit (infinite) or near-zero ohms indicates a failed sensor.
• Replace if faulty: If the sensor is defective, replace it with a Hisense-compatible bottom NTC temperature sensor. Ensure it is firmly mounted against the heating plate.
• Reassemble and test: Refit the bottom cover, reinstall the inner pot, and test with a short cooking program.