De'Longhi dehumidifier emits a musty or moldy odor during operation.

Safety first: Unplug the unit before cleaning. Avoid inhaling dust or mold; consider wearing a mask and gloves.

Step-by-step:

• 1. Clean water tank: Remove the tank and wash thoroughly with warm water and mild detergent. For heavy odor, use a solution of water and a small amount of white vinegar. Rinse well and dry.
• 2. Disinfect drain pan: Access the internal drain pan under the evaporator. Wipe it with a cloth dampened with a mild disinfectant, then rinse and dry.
• 3. Clean air filter: Wash the filter to remove dust and odor-causing particles.
• 4. Clean coil surface: Gently brush the evaporator coil fins to remove dust. If accessible, lightly spray a coil-safe cleaner and follow product instructions.
• 5. Flush drain hose: If using a continuous drain, disconnect the hose and flush it with hot water and mild detergent to remove slime.
• 6. Run on fan-only: After reassembly, run the unit on fan-only mode for 30 minutes to help dry internal surfaces.