How to remove mold in your dehumidifier

Mold is a sneaky little problem that can turn your dehumidifier into a serious health hazard in a relatively short amount of time. Don’t worry, though! If you notice mold in your unit, cleaning it is even easier than you might think, and we’re here to walk you through it! Stick with us to remove mold from your dehumidifier the right way.

If you need any replacement parts for your dehumidifier, you can enter your model number at AppliancePartsPros.com to order them. Most orders arrive in just two business days and we have thousands of free guides to show you how to install your new parts.

Important: The information in this article may not apply to your specific appliance model. While we strive to offer helpful advice for all types of appliances, variations in models and configurations can lead to differences in design. For the most accurate guidance, we strongly recommend consulting the use and care manual for your specific appliance model.

What you need

• Soft cloths or sponges
• Mild detergent or white vinegar
• Water
• Bucket
• Toothbrush (optional)
• Gloves (optional)
• Mask (optional)

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How to remove mold from your dehumidifier

Follow these steps to clean out all the mold from your dehumidifier.

1. Make sure the unit is unplugged from the power outlet.
2. Remove the water collection bucket and any filters according to the manufacturer’s instructions.
3. Dispose of any standing water in the unit.
4. Use a mixture of mild detergent and warm water — or diluted vinegar — to scrub the bucket.
5. Rinse the bucket thoroughly and allow it to dry completely.
6. If your dehumidifier has a washable filter, rinse it under warm water.
7. Use a soft brush or toothbrush to remove any stubborn mold or debris.
8. Let the filter dry completely before reinserting it.
9. Use a cloth lightly dampened with the detergent or vinegar solution to wipe down the interior of the dehumidifier. Pay special attention to corners and crevices where mold might hide.
10. Wipe the exterior surfaces of the unit with a damp cloth to remove dust and debris.
11. Once all parts are dry, reassemble the dehumidifier according to the manufacturer’s instructions.

To prevent mold from returning, regularly empty the water bucket and clean the unit at least every two weeks, especially in humid conditions.

Read more: How Dehumidifiers Work: A Comprehensive Guide

Can you use bleach to clean a dehumidifier?

Bleach is not recommended for use in a dehumidifier. Here’s why.

• Bleach can be corrosive to certain materials, including plastics and metals commonly used in dehumidifiers, which can damage the unit.
• Bleach can leave a residue that may be harmful if it enters the air or water collection system, which may pose health risks when the dehumidifier is running.
• The strong smell of bleach can linger and may not be pleasant or safe to breathe in indoor environments.

Cleaning alternatives

Instead of bleach, consider using:

• White vinegar, which is a natural disinfectant that can kill mold and bacteria
• Mild detergent solution that can clean without harsh chemicals
• Hydrogen peroxide, which is a less damaging solution to remove mold

Will a dehumidifier kill existing mold in a room?

A dehumidifier can help prevent mold growth by reducing humidity levels, but it won’t kill existing mold.

If you need to remove a small amount of mold from a room, you may be able to clean it yourself. If you do, always wear protective gear such as gloves, safety glasses and a mask to prevent irritation and the spread of mold spores. For more severe problems, you’ll need to call in a professional cleaning service or mold remediation team to remove the mold from your home.

How does a dehumidifier help prevent mold?

Mold and mildew thrive in damp environments. By lowering humidity levels (ideally below 50%), a dehumidifier creates conditions that are less favorable for mold growth and spread.

Try to keep indoor humidity between 30% and 50%. This is the recommended range according to the Environmental Protection Agency. Indoor humidity should never exceed 60%.

If you have issues with humidity in your home or generally live in a more humid area, you should use a hygrometer to monitor humidity levels. During rainy seasons or in high-humidity outdoor temperatures, you may need to run the unit more frequently.

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How to maintain your dehumidifier to prevent future problems

Follow these tips to keep your unit running smoothly.

• Keep the unit on a level, even floor
• Empty the water tank often. How often you’ll need to do this depends on how much moisture it’s pulling from the air and the size of the tank. 
• Keep an eye on the air intake and exhaust grilles. Dust and debris can block them, which can negatively affect airflow and make your dehumidifier work harder than it needs to, which can strain its internal parts.
• Keep the dehumidifier away from walls and furniture so it can perform correctly.
• Check the air filter every month and clean or replace it as needed. A fresh filter stops dust from getting inside the unit and helps the air and the machine stay clean. Check your unit’s manual for manufacturer recommendations on cleaning and replacing the filter.
• Check and clean the coils at least once a year to clean off any dust or dirt.
• Clean the water tank regularly to ward off mold and mildew. Make sure it’s dry before you reinstall it.
• If your dehumidifier drains through a hose, regularly inspect it to make sure it’s not clogged.
• Check the power cord every now and then for damage. A frayed or damaged cord can be dangerous. 
• Don’t try to hide the power cord. Keep it away from flammable materials like bedding, papers and boxes.
• If you’re not going to use the dehumidifier for a while, clean it thoroughly, empty the water container and clean the air filter before you put it away. Store it in a cool, dry spot.
• Consider investing in a hygrometer to check the humidity levels in your home. This can help you decide how much you need to use your dehumidifier.
• When in doubt, always look at the user manual and technical sheet for your unit. They are your best resources for specific maintenance instructions and troubleshooting.

Additional information

Thanks for reading! If you need replacement parts for your dehumidifier or any of your appliances, check out AppliancePartsPros.com, where you can enter your model number to find exactly what you’re looking for. Most orders arrive in two business days, and we have thousands of free resources to show you how to install your new parts.

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