How To Clean Mold Out Of Window AC Unit? (9 Easy Steps)

A moldy window air conditioner can be a serious problem. Not only can the mold be a health hazard, but it can also reduce the effectiveness of the unit.
If you are dealing with mold in your window AC, then you are in the right place.
In this blog post, we will be providing you with a detailed step-by-step guide on how to clean mold out of window ac unit.
Keep reading to learn about how you can make your window AC unit free of mold.
Tools you will need to clean mold from window air conditioner
Before you start the cleaning process, you need to have all the necessary tools and equipment. Here, what you need to clean moldy window AC unit:
- A Phillips Screwdriver
- A Scrub Brush
- Bleach: Prepare a cleaning solution by mixing 1 cup of bleach into 1 gallon of water. This bleach solution will help kill mold.
- Clean water: Keep clean water on hand for rinsing off the bleach solution after it has been applied.
- A dry cloth
- Protective gears such as rubber gloves, eyewear and a face mask.
Once you have these tools, you are ready to proceed further.
A step-by-step guide to clean mold out of window AC unit
You may not know it but presence of mold cause fish scent from AC. Therefore, here is a detailed step-by-step guide with pictures to cleaning mold out of your window air conditioner.
Step 1: Unplug the AC unit from the power outlet and carefully remove it from the window.
To begin the process of cleaning mold from your air conditioner, it is crucial to first disconnect the unit from its power source and carefully remove it from the window and put it in a well-ventilated place.


This step ensures your safety, prevents the spread of mold in your space and makes it easier to access all sides of the air conditioner for proper cleaning.
Step 2: Remove the front cover of your AC unit
Once you have unplugged and detached the air conditioner from the window, next, remove the front cover of the unit.
The front cover covers the filter and other internal components. However, the methods of removing the cover are not the same in all window air conditioners.
Typically, the front cover can be easily detached by pressing release buttons or tabs. Gently remove the front cover and keep it aside in a safe place.




You will also get access to the air filter so remove it and keep it aside for cleaning.
Step 3: Remove the front and the above panel
After removing the front cover of your AC unit, it is also recommended to remove the front and the upper panel for an effective cleaning and to completely eliminate mold out of your window air conditioner.
While it is possible to clean mold from your AC unit without removing these panels, doing so allows for better access to all the components that may be affected by mold.
The upper panel is usually positioned above the front panel and provides access to crucial parts such as the fan and motor and the front panel adds to it.
To remove the front panel, screws off the screws that are securing the panel and pop the wire out and remove it.



For the above panel, you will need to unscrew a series of screws located on the sides and possibly on the back as well. Carefully unscrew these screws.


Once you have unscrewed all the screws, gently lift the panel off, make sure not to snag any wires or other parts in the process.
With the front and the upper panel removed, you will have a clear view of the internal components and better accessibility for cleaning.
However, even with the upper panel removed, the motor may still be covered with a metal cover or a foam insulation material.


To access the motor for cleaning, you will need to cut the tape that holds the foam cover in place. This will expose the fan motor and allow you to clean it properly to remove mold out of your window air conditioner.
Step 4: Spray the cleaning solution on each single part
Now it’s time to apply the cleaning solution to each and every single part of the unit. This step is crucial in eliminating mold and disinfecting the components effectively. Here’s how to proceed:
Take a spray bottle filled with water and mix in one-third cup of bleach. Optionally, you can add detergent to the mixture if desired. Make sure you are working in a well-ventilated area and wear gloves, a mask, and eyewear for your protection.
Once the cleaning solution is prepared, begin by spraying it onto all the exposed parts of the AC unit. Start with the parts that were removed earlier, such as the air filter, front cover, front and upper panels, side panels, foam insulation and all those even the ones that don’t have mold or anything.


Next, focus on spraying the interior surfaces of the AC unit. This includes the coils, vents, and other areas where mold growth is likely. Pay close attention to reaching all the nooks and crannies where mold may be present.

When spraying, be mindful not to spray it directly onto electronics or electrical connections. Take extra care when treating the fan blades and the motor.
Step 5: Take a brush and give a scrub to all the sprayed parts
Once you have applied the cleaning solution to each part of the AC unit, it’s time to give them a good scrub to remove stubborn mold and dirt.
Take a brush with bristles that is appropriate for the surfaces you are scrubbing. Gently scrub each surface of the sprayed part using the brush. Focus on areas where mold growth or dirt accumulation is visible.

Use circular or back-and-forth motions and don’t be crazy when scrubbing, applying a moderate pressure to loosen and remove any contaminants or buildups and and adjust the pressure according to the fragility of the part.
Take extra care when scrubbing sensitive parts, such as fins or coils, to avoid causing any damage. And also keep in mind to clear dirt and other particles from the evaporator coils, since a dirty coils may cause water-like sound from your window AC.
In addition, pay close attention to hard-to-reach spots, such as crevices, vents, and corners and areas where mold is present.
Rinse the brush periodically to remove any debris or buildup that may have accumulated during the scrubbing process. This helps to keep the brush effective throughout the scrubbing.
Step 6: Rinse all the scrubbed parts and the unit properly
Here comes the fun part in this process of cleaning out mold of window air conditioner and that’s to rinse off all the scrubbed parts and the unit itself properly.
To rinse it, use a garden hose to spray water on all the parts of the AC unit. Start with the air filter and give it a little extra attention by increasing the water pressure just a bit.


Make sure to rinse every single part of your window air conditioner thoroughly. Keep rinsing until the water runs clear and there are no more visible residue or dirt.
When spraying the water, focus on the inside of the unit. Be careful not to spray water directly on the electronics or wiring.
Step 7: Use a soft cloth, sponge or tissue paper to wipe down the unit
After properly rinsing off the unit and all its parts, proceed to Step 7 and that to wipe down the unit to remove any remaining dirt or mold spores.

You can use a soft cloth, sponge, or tissue paper to do so. Be sure to wipe down the exterior of the unit, as well as the fan blades, any other components and the interior surface with a gentle touch.
Wiping down to remove the remaining dirt or mold spores will also help wipe some water from the unit and help it dry out a bit faster. However’
Step 8: Let the unit dry for 24 hours
After spraying, scrubbing, rinsing and wiping all the parts of the window AC unit, it’s important to allow it to dry for at least 24 hours before reassembling and turning it on.
You can speed up the drying process by placing the cleaned parts and unit in a well-ventilated area or in front of a fan.
However, avoid placing it under direct sunlight as this may damage the components of the unit. Make sure to check if all parts are completely dry before reassembling.
Moisture in the unit can not only promote mold growth, but it can also lead to electrical hazards, so be sure to err on the side of caution.
Step 9: Resemble the unit and put it back to the window
Once the AC unit has thoroughly dried, it’s time to reassemble and put it back in its place. Start with the foam insulation material, put it back in its place, above the motor and secure it with the tape.

After that, put the upper panel that you have removed earlier in this mold cleaning process of your window air conditioner and screw all screws.
Next, attach the front cover of the unit properly and after that place the air filter back in its place. Once the unit is assembled, lift it and install the window air conditioner in the window and secure it properly.
After securing it, plug it in and switch it on and make sure it’s working smoothly. If everything is fine, it’s time to relax and enjoy your clean, fresh-smelling, mold-free window AC unit.
How to clean mold out of window air conditioner? FAQs
In this FAQ, you will find answers to common questions about cleaning mold from window air conditioners. These questions have been asked by owners of window AC units who are dealing with mold issues in their air conditioning systems.
Q1. What are the potential health risks associated with mold growth in a window AC unit?
Ans: The health risks associated with mold growth in a window AC unit can pose respiratory issues due to inhaling mold spores, allergies, or worsening asthma symptoms.
Q2: What are some common signs that indicate mold growth in a window AC unit?
Ans: Some common signs that indicate mold growth in a window AC unit include visible black or green patches, a musty odor, allergic reactions, water leakage, a sudden increase in energy bills, and poor air flow.
Q3. What are the recommended cleaning products or solutions for removing mold from a window AC unit?
Ans: For removing mold from a window AC unit, the recommended cleaning options are vinegar-water mixture, bleach mixed with water, or commercial mold cleaners.
Q4. Are there any specific areas of a window AC unit that are more prone to mold growth?
Ans: Yes, certain areas of a window AC unit are more prone to mold growth, These areas include air vents, filters, and drainage areas.
Q5. How can I prevent mold growth in my window air conditioner in the future?
Ans: You can prevent mold growth in your window air conditioner by regularly cleaning the unit, ensuring proper ventilation, managing humidity levels with a dehumidifier, and promptly addressing any leaks or drainage issues. These measures help minimize moisture and create an environment less favorable for mold.
Cleaning mold from a window AC unit: Conclusion
Cleaning mold out of your window AC unit is a crucial step to maintaining healthy air quality in your home.
Neglecting it can lead to respiratory issues, allergies, and a decrease in the efficiency of your air conditioning unit.
By following the steps outlined in this guide, you can clean out of your window air conditioner effectively.
Regular maintenance, including cleaning the filters, drainage pan, and drain line, can help prevent mold growth in your AC unit.