How to Clean Your Dehumidifier

Dehumidifiers are invaluable for keeping your home comfortable and preventing dampness, mould, and mildew. However, without regular cleaning, they can become counterproductive—losing efficiency and even worsening indoor air quality. To ensure your dehumidifier performs at its best, regular maintenance is crucial, whether it's a refrigerant or desiccant model. In this guide, we’ll break down everything you need to know to keep your dehumidifier in top shape.

Link to Why You Should Clean Your DehumidifierWhy You Should Clean Your Dehumidifier

Over time, dust, dirt, and even mould can accumulate inside, reducing efficiency and risking the spread of harmful particles. By staying on top of maintenance, you can prevent blockages that might lead to mechanical issues and extend the lifespan of your unit.

Link to Types of Dehumidifiers and How They WorkTypes of Dehumidifiers and How They Work

It helps to know how different types of dehumidifiers function, as different types have different cleaning and maintenance needs:

• Refrigerant Dehumidifiers: These units draw in humid air using a fan, pass it over cold coils to condense moisture, and collect it in a tank. The dried air is then reheated and released.
• Desiccant Dehumidifiers: Using a desiccant material, like silica gel, these units absorb moisture from the air. Moisture is either collected in a tank or expelled. Unlike refrigerant models, desiccant dehumidifiers don’t use coils.

Link to How to Clean a Refrigerant DehumidifierHow to Clean a Refrigerant Dehumidifier

Refrigerant dehumidifiers have several components—water tanks, filters, fans, and coils—that require regular care. Here’s how to properly maintain each part:

Link to 1. Cleaning the Water Tank1. Cleaning the Water Tank

The water tank is a prime spot for mould and bacteria, so it needs attention often.

• Empty the Tank: Always unplug the unit before cleaning to avoid any risk of electric shock. Pour out the collected water, making sure the tank is completely empty. Stagnant water is a perfect breeding ground for bacteria and mould.
• Wash Thoroughly: Use warm water and a mild soap to scrub the tank’s interior. A soft brush can help reach any tricky spots or deposits. Proper cleaning prevents biofilm buildup, which can lead to odors and decreased efficiency.
• Rinse and Dry: After scrubbing, rinse thoroughly to remove all soap. Let the tank air dry completely before reinserting it to avoid residual moisture that could encourage mould growth.

Link to 2. How to Clean the Air Filter2. How to Clean the Air Filter

The air filter in your dehumidifier traps dust and helps maintain optimal airflow. It’s best to clean the air filter about every two to four weeks.

• Remove the Filter: Find the filter at the back of the unit and gently remove it according to the manual’s instructions to avoid any damage.
• Vacuum and Wash: Use a vacuum to remove loose dust. For a deeper clean, rinse the filter under running water and use mild soap if needed. Make sure it is fully dry before reinserting it—a damp filter can become mouldy.

Link to 3. Cleaning the Coils3. Cleaning the Coils

The coils are crucial for condensing moisture but tend to gather dust, which affects performance.

• Unplug for Safety: Always unplug the unit before accessing the coils.
• Use Gentle Tools: Gently clean the coils using a soft brush or cloth. Avoid using anything abrasive that might damage them. If the buildup is tough, consider using a specialized coil cleaner.
• Avoid Bending the Fins: The fins on the coils are delicate and can easily bend, which reduces efficiency. Be very gentle while cleaning.

Link to 4. Cleaning the Fan4. Cleaning the Fan

The fan moves air through the dehumidifier, and dust can hinder its efficiency.

• Access the Fan: Some models require removing the cover to reach the fan. Consult your manual before doing this.
• Wipe Gently: Use a soft cloth to carefully clean the fan blades. If there’s significant dust, a vacuum with a brush attachment can help before wiping.

Link to 5. Deep Cleaning5. Deep Cleaning

Every few months, it’s a good idea to give your unit a deep clean.

• Disassemble Carefully: Remove the water tank, filter, and cover. Keep all screws and parts organized for easy reassembly.
• Vacuum Inside: Use a vacuum to clean dust from the internal parts, focusing on the fan, coils, and any vents.
• Use Vinegar for mould: If you notice mould, mix equal parts water and white vinegar and use it to clean the affected areas. Vinegar is effective at killing mould spores.

Link to How to Clean a Desiccant DehumidifierHow to Clean a Desiccant Dehumidifier

Desiccant dehumidifiers don’t have coils but still need regular maintenance.

Link to 1. Cleaning the Water Tank1. Cleaning the Water Tank

• Empty and Wash: Just like with refrigerant models, regularly empty and wash the water tank using warm water and mild soap. Ensure it’s thoroughly scrubbed to prevent residue.
• Rinse and Air Dry: Rinse well and let it air dry completely before placing it back.

Link to 2. Maintaining the Desiccant Material2. Maintaining the Desiccant Material

• Inspect the Wheel: If your model has a desiccant wheel, inspect it periodically for signs of dirt or wear. A clean, well-functioning desiccant wheel is necessary for effective moisture absorption. If it appears worn or compromised, refer to the manual for replacement instructions.

Link to 3. Cleaning the Air Filter3. Cleaning the Air Filter

• Remove and Clean: Remove the filter and vacuum off any loose dust. Rinse with water if necessary, and use a small amount of mild soap if it is heavily soiled. Ensure that it is completely dry before reinserting it, as moisture can encourage mould growth.

Link to 4. Cleaning the Air Intake and Exhaust4. Cleaning the Air Intake and Exhaust

• Wipe the Grills: Dust can easily accumulate on the air intake and exhaust grills, obstructing airflow. Use a damp cloth to wipe these areas down, ensuring that air can flow freely.

Link to General Cleaning Tips for All DehumidifiersGeneral Cleaning Tips for All Dehumidifiers

• Clean the Surrounding Area: Dust around the unit can be pulled inside the dehumidifier, which can clog the filter and reduce the overall efficiency.
• Empty the Tank Frequently: Don’t let the tank overflow. Empty it often to prevent leaks and minimize mould growth.
• Seasonal Storage: If you’re putting the dehumidifier away for a season, clean it thoroughly first. Store it in a dry, cool place, and cover it to keep dust out.
• Check Hoses and Seals: Inspect hoses and seals for wear or damage. Over time, hoses can crack, and seals may weaken, impacting efficiency.

Link to Frequently Asked Questions (FAQ)Frequently Asked Questions (FAQ)

Q1: How often should I clean my dehumidifier?

• Clean the water tank weekly, the filter every two to four weeks, and give the unit a deep clean every two to three months. Frequency depends on usage and humidity levels.

Q2: Should I be using bleach to clean my dehumidifier?

• Bleach can be used but must be diluted properly. Always rinse thoroughly afterward. Vinegar is a gentler alternative.

Q3: What happens if I don’t clean my dehumidifier?

• mould and bacteria can grow, efficiency will drop, and unpleasant odors may develop. Lack of maintenance can eventually lead to breakdowns.

Q4: Why is my dehumidifier freezing over?

• Dirty coils, restricted airflow, or low room temperature can cause freezing. Ensure the coils are clean, and keep the room above 18°C (64°F).

Q5: Can I clean the filter with a vacuum?

• Yes, vacuuming is a good first step to remove dust before rinsing the filter.

Q6: How do I prevent mould from forming in my dehumidifier?

• Regular cleaning is key, especially of the tank, coils, and filter. Use vinegar as a natural disinfectant and ensure everything is dry before reassembling.

Link to Wrapping UpWrapping Up

Taking good care of your dehumidifier ensures it takes care of you. Routine maintenance—whether you own a refrigerant or desiccant model—keeps your unit functioning at its peak, prolongs its lifespan, and maintains a comfortable, healthy home environment. With consistent and attentive maintenance, your dehumidifier will keep your living environment free from excess moisture and provide you with optimal indoor humidity.