The 8 mistakes you can make when setting up your dehumidifier
Steven E / Tuesday March 25, 2025
Ever wonder why your dehumidifier isn’t yanking as much moisture out of the air as you’d expect? Sometimes, it’s as simple as putting it in the wrong spot. Whether you’re battling that musty smell or can’t shake off the excess humidity, where you place your dehumidifier can make all the difference. Let’s dive into some common slip-ups and see how tweaking them can keep your home comfy and dry.
The info here might not match up perfectly with your specific dehumidifier model. We try our best to provide helpful tips for all kinds of DIY appliance fixes, but different models mean things can vary, like troubleshooting steps, error codes, or parts needed. For the most accurate advice, it’s best to check your manufacturer’s manual or holler at us if you’ve got any questions.
Mistake 1: placing your dehumidifier too close to walls or furniture
One of the biggest mistakes you can make is placing your dehumidifier in a spot where airflow is restricted. When a dehumidifier is too close to a wall or large pieces of furniture, the air intake and exhaust may be blocked, making the unit work harder to pull moisture from the air. This can lead to longer run times and lower efficiency.
- Tip: Make sure there’s at least 6 inches of space on all sides of the dehumidifier to allow for proper airflow.
- Why it matters: Better airflow means more moisture is removed from the air, improving efficiency and reducing wear on the motor.
Mistake 2: Setting it in a too-dry or too-humid area
Another common mistake is placing the dehumidifier in a spot where it’s either too dry or too humid for the unit to work efficiently. if your dehumidifier is placed in an area that’s already too dry, it won’t have enough moisture to extract, which means it’s working harder than needed. On the other hand, placing it in a space that’s too humid (like next to a steam-producing appliance) can overload the unit and cause it to struggle to reach optimal levels of efficiency.
- Tip: Place the dehumidifier in an area with moderate humidity (around 50-60%) for the best performance.
- Why it matters: The unit will run more efficiently if it has a steady supply of moisture to remove without being overwhelmed by excess humidity.
Mistake 3: Ignoring proper drainage options
A lot of people make the mistake of relying on the dehumidifier’s internal water tank and forget to consider a more efficient drainage solution. Constantly having to empty the tank can be inconvenient, especially if the dehumidifier is running for extended periods. Over time, this can become a hassle, and you might even stop using it properly, which reduces its effectiveness.
- Tip: Opt for a dehumidifier with a continuous drainage option, like a hose that drains directly into a floor drain or a sink.
- Why it matters: This will save you time and effort by eliminating the need to manually empty the water tank, allowing the unit to run uninterrupted for longer periods.
Mistake 4: Overloading by running it in a large space
Using a dehumidifier that’s too small for the room size is a common mistake. If your dehumidifier isn’t powerful enough for the space, it will struggle to keep the humidity levels in check. This leads to longer operating times and increased energy consumption, and it still won’t effectively reduce moisture in the air.
- Tip: Choose a dehumidifier that’s appropriately sized for the room or space you’re using it in. Check the unit’s recommended square footage to ensure it’s a good match.
- Why it matters: A properly sized unit will remove moisture more efficiently and help maintain optimal humidity levels without overworking the system.
Mistake 5: Not cleaning or maintaining the dehumidifier regularly
Like any appliance, dehumidifiers need regular cleaning and maintenance to function properly. Dust, dirt, and mold can accumulate on the filters, coils, and drainage system, blocking airflow and reducing the unit’s efficiency. Neglecting maintenance can also shorten the lifespan of the dehumidifier and cause it to operate poorly.
- Tip: Clean the filters regularly (at least once a month), and make sure to check for any mold or mildew buildup in the water tank and drain hose. Also, wipe down the coils to remove dust.
- Why it matters: Keeping your dehumidifier clean ensures it runs efficiently and prolongs its life, making sure it continues to remove moisture effectively.
Mistake 6: Placing it in a location with poor air circulation
If you place your dehumidifier in an area with limited air circulation, like a corner or behind heavy furniture, it will struggle to pull in the moisture from the air. air needs to flow freely for the dehumidifier to work its best. Without proper airflow, the unit won’t be able to collect moisture as effectively, leading to inefficient operation.
- Tip: Place the dehumidifier in an open area with plenty of space around it. Avoid putting it behind furniture, drapes, or in corners.
- Why it matters: Better air circulation allows the dehumidifier to capture more moisture from the air and run efficiently.
Mistake 7: Not adjusting the humidity settings correctly
Many people leave their dehumidifiers on the default setting without considering the actual humidity level in the room. If the humidity is already low, setting the dehumidifier too high can make the room too dry, which isn’t ideal for comfort or health. On the other hand, setting it too low in a particularly humid room won’t do much to combat excess moisture.
- Tip: Use a hygrometer to monitor the humidity in your space and set the dehumidifier to maintain a comfortable level (ideally around 50-60%).
- Why it matters: Adjusting the settings based on actual humidity ensures the unit doesn’t work too hard or too little, balancing comfort and efficiency.
Mistake 8: Running the dehumidifier without checking the filter or fan condition
The filter and fan in your dehumidifier are essential for its performance. If they’re clogged or damaged, they can reduce airflow and efficiency, making it harder for the unit to remove moisture. Running the dehumidifier under these conditions can cause it to overheat, reduce its lifespan, or even stop working altogether.
- Tip: Check the filter and fan periodically for dirt, dust, or damage. Clean or replace the filter as needed, and ensure the fan is working smoothly.
- Why it matters: Keeping these parts in good condition ensures the dehumidifier works efficiently and lasts longer, avoiding breakdowns and unnecessary repairs.
Additional information
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With nearly a decade of experience in providing top-notch customer service regarding appliance parts and repair, Steven enjoys sharing practical advice, troubleshooting tips, and interesting information to help readers stay informed.