Whynter Biological Growth in Drain Pan and Coils

Dehumidifier emits a musty or moldy odor from the air outlet

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Possible Causes

Standing water in drain pan, Dirty evaporator coil, Clogged drain causing water stagnation, Dirty air filter harboring mold

How to Fix / Troubleshooting

Safety first: Unplug the unit before cleaning. Wear gloves and a mask if you are sensitive to mold.

Steps to remove odor:

  • Clean filter: Wash the filter with warm soapy water and let it dry completely.
  • Access drain pan: Remove the front cover to reach the evaporator coil and drain pan beneath it. Wipe the pan with a cloth and a mild disinfecting solution. Do not flood the unit with water.
  • Clean coil surface: Use a coil-safe cleaner or a damp cloth to gently clean the evaporator fins.
  • Check drain: Ensure the drain hole and hose are clear so water does not sit in the pan.

After cleaning, run the unit in fan-only mode for 30 minutes to help dry internal surfaces.

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Repair Difficulty

Easy 2/5

Required Part

Evaporator Drain Pan
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