Multicooker beeps and displays E1 shortly after powering on; cooking will not start.

Safety first: Unplug the Crock-Pot multicooker and allow it to cool completely before opening any panels. Never work on the unit while it is connected to power.

• Power reset: Unplug the cooker for 10 minutes, then plug back in and try a simple program (e.g., Keep Warm). If E1 returns immediately, continue below.
• Check for obvious damage: Inspect the underside and sides of the cooker for signs of impact or liquid spills that may have damaged internal wiring.
• Access the base: Turn the unit upside down on a soft towel. Remove the screws securing the bottom cover (usually Phillips). Carefully lift the cover to expose the heating plate and wiring.
• Locate the NTC sensor: Find the small sensor clipped or screwed to the center of the aluminum heating plate or attached with a metal bracket. It typically has two thin wires leading to the main control board.
• Check connections: Ensure the sensor plug is fully seated on the main PCB header. Gently unplug and replug the connector to clear oxidation. Look for broken or frayed wires along the harness.
• Basic continuity check (optional): With a multimeter set to resistance (ohms), measure across the two sensor leads (with the unit unplugged). A completely open reading (OL) indicates a failed sensor.
• Reassemble and test: Refit the bottom cover, tighten screws, plug in, and test again. If E1 persists, the sensor or control board is likely defective.
• When to replace: If the sensor wiring is intact but E1 remains, replace the main temperature sensor (NTC) assembly. If a new sensor does not resolve the issue, the main control board may need professional replacement.