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

Safety first: Unplug the Tower multicooker from the mains and allow it to cool completely before opening any panels.

• Power reset: Leave the unit unplugged for 10–15 minutes, then plug back in and try a simple program (e.g. Keep Warm) with an empty, dry inner pot. If E1 clears, it may have been a transient fault.
• Check inner pot seating: Remove the inner pot, wipe the base and the cooker’s heating plate with a dry cloth. Ensure there is no food, foil, or debris preventing proper contact. Refit the pot and test again.
• Inspect bottom sensor wiring: With the unit unplugged, remove the bottom cover (usually several screws). Locate the small NTC sensor clipped to or near the central heating plate. Check for broken, pinched, or burnt wires and reseat any push connectors going to the main PCB.
• Test the NTC sensor: Using a multimeter set to resistance, measure across the NTC leads. A typical NTC will read between 5–150 kΩ at room temperature. An infinite (open) reading indicates a failed sensor that must be replaced.
• Reassemble and test: After replacing or reseating the sensor, reassemble the base, ensuring no wires are trapped, then test a short cooking cycle with water.

If E1 persists after confirming wiring and replacing the sensor, the main control PCB may be misreading the sensor and should be diagnosed or replaced by a qualified technician.