Honeywell Biological Growth in Water Path

Dehumidifier emits a musty or moldy odor during operation.

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Possible Causes

Mold or mildew in water bucket, Slime buildup in drain channel, Dirty evaporator coil, Stagnant water in continuous drain hose

How to Fix / Troubleshooting

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

Steps:

  • Clean bucket: Wash the water bucket with warm water and a mild bleach solution (1 part bleach to 10 parts water). Rinse thoroughly and dry.
  • Disinfect drain channel: Use a small brush and disinfectant to clean the drain spout and surrounding plastic tray.
  • Clean coils and filter: Clean the air filter and, if accessible, lightly spray the evaporator coil with a coil cleaner that has antimicrobial properties.
  • Flush drain hose: If using a continuous drain, disconnect and flush the hose with hot water and mild bleach, then reconnect with proper slope.

Tip: Periodically empty and clean the bucket even when using continuous drain to prevent odor buildup.

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Repair Difficulty

Very Easy 1/5

Required Part

Water Collection Bucket
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