The multicooker beeps and displays E1 shortly after starting any cooking program; heating does not begin or stops immediately.

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

Step-by-step checks:

• 1. Power reset: Unplug the cooker for 10 minutes, then plug it back in and try a simple program (e.g., white rice). If E1 returns immediately, proceed to the next step.
• 2. Inspect bottom sensor wiring: Remove the inner pot and examine the center of the heater plate. Most Toshiba multicookers have a small temperature sensor (NTC) mounted under or near the heater plate. Access it from the bottom by removing the base cover (usually several Phillips screws). Check the two-wire harness from the sensor to the main PCB for cuts, burns, or pinched sections.
• 3. Check connectors: Locate the sensor connector on the main control PCB. Reseat it by unplugging and firmly plugging it back in. Look for corrosion or bent pins.
• 4. Basic resistance test (for experienced DIYers): With the unit unplugged and the sensor disconnected, measure resistance across the sensor leads using a multimeter. A typical NTC sensor will read between 5–100 kΩ at room temperature (the exact value depends on the model). An open circuit (OL) or 0 Ω indicates a failed sensor.
• 5. Replace the sensor if faulty: If the resistance is out of range or intermittent when you gently move the wires, replace the bottom NTC temperature sensor assembly specific to your Toshiba model. Route the new harness exactly as the original to avoid heat damage.
• 6. If the sensor tests OK: The fault may be in the main control PCB’s sensor input circuit. Inspect the board for burn marks or damaged components. Replacement of the main PCB is usually required and is best performed by a qualified technician.

Do not bypass or short the sensor to clear the error; this can cause overheating and a fire risk.