Bialetti digital coffee maker shows E05 and shuts down; sometimes accompanied by tripped household breaker or burning smell.

Safety first: Immediately unplug the machine. Do not attempt to power it on again until the fault is identified. If you smell burning or see smoke, keep the unit unplugged and away from flammable materials.

• Inspect the power cord: Check for cuts, crushed sections, or exposed copper. Replace the cord if any damage is found.
• Check for visible moisture: Look around the water tank area, base, and under the top cover (if you remove it) for signs of leaks that may have dripped onto the electronics. Dry thoroughly and fix any leaks before reassembly.
• Examine the control board (advanced): With the cover removed and the unit unplugged, inspect the PCB for burn marks, swollen components, or corrosion. Any visible damage usually means the board must be replaced.
• Test the heating element (advanced): Use a multimeter to check resistance across the heating element terminals. A dead short (near 0 ohms) or open circuit indicates a failed heater.

Because E05 indicates a potentially dangerous electrical fault, replacement of the control board or heater should be done by a qualified technician unless you are experienced with appliance repair.