Perform Professional Descaling and Internal Component Inspection

Safety Warning: Immediately unplug the machine and allow it to cool for at least 45 minutes before attempting any maintenance.

Since this issue involves potential electrical failure due to scale-induced dry-firing, follow these steps to restore functionality:

1. Remove the Infuser: Open the side service door and remove the brew unit to check for physical obstructions.
2. Deep Clean: Rinse the infuser under warm water to remove residual grounds that may be contributing to flow resistance.
3. Professional Evaluation: Because an acrid burning smell indicates potential internal wiring damage or a failed thermal fuse, do not attempt to run a chemical descaling cycle. Contact DeLonghi Customer Service to arrange a professional safety evaluation and factory-authorized repair, as internal electrical components are not user-serviceable.

Verify the fix is complete only after an authorized technician has confirmed the internal electrical integrity and cleared any mineral-induced blockages.

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