Machine will not heat, display shows E01 shortly after power-on and brew is disabled.

Safety first: Unplug the Dualit coffee maker and allow it to cool completely before opening any panels. Never work on a live appliance.

Step-by-step checks:

• Power-cycle the machine: Unplug for 5 minutes, then reconnect and try again. Sometimes a transient error clears.
• Access the boiler area: Remove the top or rear cover (varies by model such as Dualit Espressivo or 4-in-1). Keep track of screws and do not force plastic clips.
• Inspect the NTC sensor: Locate the small probe or button-style sensor clipped or screwed to the boiler/thermoblock. Check for signs of damage, cracking, or burnt insulation.
• Check connections: Ensure the NTC plug is firmly seated on the main PCB and at the sensor end. Look for corrosion or loose pins; clean gently with electrical contact cleaner if needed.
• Test resistance: With a multimeter set to ohms, measure the NTC resistance at room temperature. Compare to service specs (commonly 50–100 kΩ at 25°C; consult Dualit documentation). If reading is open circuit or shorted, the sensor is faulty.
• Inspect wiring harness: Follow the cable from sensor to PCB, checking for pinched, cut, or heat-damaged insulation. Repair or replace damaged wiring.
• If sensor and wiring test OK: The temperature input circuit on the main control PCB may be defective. Replacement of the PCB is usually required and is best done by a qualified technician.

When to stop: If you smell burning, see melted plastic, or are unsure about electrical testing, stop and contact a professional technician.