The short answer
Start with Safety
Before you touch anything, unplug the dehumidifier and empty the water tank. Mold spores can become airborne when you disturb the unit, so wear gloves, safety glasses, and a dust mask. Work near an open window or in a well-ventilated area to avoid breathing in spores.
If you feel unwell while cleaning, stop and see a doctor. Mold can trigger allergies or respiratory issues. For a serious mold problem inside the unit, you may want to replace the dehumidifier rather than risk incomplete cleaning.
Remove and Wash Parts
Take out the water tank and the air filter if your model has one. Wash the tank with warm water and dish soap, then rinse it with a solution of one part white vinegar to three parts water. Let it air dry completely before putting it back.
For the filter, rinse it under running water and gently scrub with a soft brush. If the filter is heavily moldy or damaged, replace it. Check your owner's manual for the correct replacement part.
- Unplug the unit first
- Wear gloves and a mask
- Remove water tank and filter
- Wash with soapy water
- Rinse with vinegar solution
- Air dry all parts fully
Clean Interior Surfaces
With the parts removed, look inside the dehumidifier. You will likely see the coils, a fan, and a drip pan. Use a soft cloth or a small brush dipped in a mild bleach solution (one tablespoon bleach per gallon of water) to wipe down these surfaces. Avoid getting the motor or electrical components wet.
Pay attention to the drip pan and any crevices where mold tends to collect. A cotton swab or an old toothbrush can reach tight spots. Wipe everything dry with a clean towel. Do not reassemble until every surface is completely dry, or mold will return quickly.
Disinfect and Dry
After cleaning, wipe the interior again with a cloth dampened with the bleach solution. This kills lingering mold spores. Then use a dry cloth to remove excess moisture. Let the unit sit open for a few hours in a dry, ventilated area.
Once everything is dry, put the filter and tank back in place. Plug the unit in and run it for a few minutes to confirm it works. If you notice a musty smell, repeat the cleaning process.
Prevent Future Mold
Regular maintenance stops mold from taking hold. Empty the water tank daily, and clean the filter every two weeks. Keep the area around the dehumidifier clear so air can circulate. If your home has high humidity, consider using a dehumidifier with a built-in humidistat that runs only when needed.
For deeper moisture problems, such as after a flood or leak, you may need more than a small unit. Water damage pros can assess the situation and provide structural drying and dehumidification services. If you live in Layton, keep the model number of your dehumidifier handy for replacement parts.
- Empty the tank daily
- Clean the filter every two weeks
- Keep the area around the unit clear
- Use a humidistat model if possible
- Replace the unit if mold returns often
- Seek professional help for large moisture issues
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Call Now (801) 383-0232Frequently asked questions
Can I use vinegar instead of bleach?
Yes, white vinegar is a natural mold killer and safer for some surfaces. Mix one part vinegar with three parts water. It works well on non-porous parts, but for stubborn mold, a diluted bleach solution is more effective.
How often should I clean my dehumidifier?
During heavy use, clean the filter and tank every two weeks. A deeper clean of the coils and interior should happen once a month. If you notice a musty smell, clean it sooner.
What if the mold is inside the motor?
Do not attempt to open the motor. Unplug the unit and contact a small appliance repair shop or the manufacturer. If the mold is extensive, replacing the dehumidifier is often the safest choice.