Inventor Microbial Growth on Coils or in Water System

Dehumidifier emits a musty or moldy smell from the air outlet

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Possible Causes

Dirty evaporator coil, Stagnant water in tank, Contaminated drain hose, Dirty air filter

How to Fix / Troubleshooting

Safety: Unplug the unit. Wear gloves and, if sensitive, a mask when cleaning moldy components.

  • Clean water tank: Wash the tank with warm soapy water and a mild disinfectant. Rinse thoroughly.
  • Clean air filter: Remove and wash the filter. Allow it to dry completely before reinstalling.
  • Coil cleaning: Access the evaporator and condenser coils. Use a non-corrosive coil cleaner suitable for aluminum and rinse lightly, avoiding overspray on electronics.
  • Drain hose: If using continuous drain, flush the hose with a mixture of water and mild bleach, then rinse.
  • Drying cycle: After cleaning, run the unit in fan-only mode (if available) for 30–60 minutes to dry internal surfaces.
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Repair Difficulty

Very Easy 1/5
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