Burning smell during operation, even though the machine still works.

Safety first: If the smell is strong or accompanied by smoke, unplug immediately and do not use the machine.

Steps:

• Initial use: A slight smell during the first few uses can be normal. If it persists, investigate further.
• Clean exterior surfaces: Wipe away any coffee spills or oils near the hot plate or boiler area.
• Internal inspection (advanced): Open the housing and look for discolored wires, melted insulation, or burnt spots on the PCB or heater connections.
• Stop use if damage found: Replace any burnt components or have the unit serviced professionally.