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Window air conditioner smell musty

Window air conditioner smell musty. How to get rid of the musty smell in your Window AC. Window air conditioners are an essential part of our homes. They cool our homes and keep us comfortable.

The AC smells musty not just because it is old but also due to the build-up of dust particles. Dust accumulates over time and clogs the vents.

This causes the air to stagnate inside the air conditioner, resulting in a musty smell. Unfortunately, if your window AC smells musty, there’s not much you can do about it. Fortunately, you can get rid of the scent with a few simple steps.

Window air conditioner smell musty

Air conditioning is one of the most important appliances. During the summer and winter, they help keep us warm.

Window air conditioners are less popular than central air conditioning systems. They are easier to install and less expensive.

If you own a window air conditioner, you need to clean it. Fans push the air into the room. The atmosphere is usually pushed in through a vent.

Over time, dust and dirt collect on the vent, reducing the airflow. This results in stale air and a musty smell. This is why you should clean your AC vents regularly.

Here are a few tips to remove a musty smell from your AC:

Clean the AC

cleaning the ac

The AC needs to be cleaned. Make sure you clean the unit thoroughly. The unit’s exterior should be wiped down too.

A vacuum cleaner is the best way to remove the musty smell. You can also use a handheld vacuum. Vacuums will suck up dirt and dust.

Use a dryer sheet

You can also use a dryer sheet to eliminate the musty smell. Just place a dryer sheet inside the vent to absorb the moisture and eliminate the odor.

Clean the filter

To remove the musty smell, you must clean the filter. The filter collects the dust and debris that accumulates inside the vents.

If the filter is dirty, it will stop the flow through the vents and cause the air to stagnate inside the AC.

Use a Dehumidifier

dehumidifier to get rid of ac smell

If the AC still smells musty, you can try using a dehumidifier. This will help you remove any excess moisture in the air.

You can use a fan to blow the air into the dehumidifier. If the AC is located close to a wall, you can also place the dehumidifier on the wall.

Clean the coil

The coils are the heating element responsible for heating the air in the air conditioner. If the coils are clogged, they may not heat the air properly.

This will result in the AC not working as efficiently, and the air will stagnate inside the unit.

Change the filter

The filter should be changed once a year. The air will flow smoothly if the filter is changed. If the AC still smells musty after following all the steps, you can check the filter. You can also look for an AC company that offers filter replacement.

Clean your windows regularly

Regular cleaning helps remove the dirt and debris inside your AC unit. When you clean your AC, you can also use a solution of water and vinegar to keep the filter clean.

  1. You can use this method if you cannot get your AC cleaned by a professional.
  2. Keep the filters clean. If you have a gas furnace, you will need to regularly clean the filters on your system. Gas furnaces can hold up to three filters.
  3. Check the ducts and vents for any blockage. Blockages can cause air to back up into your home or even cause carbon monoxide poisoning.


A musty smell can ruin a nice home. Especially during the winter months, when people are trying to stay warm. A musty smell can turn a room into a prison, but fortunately, there are several things you can do to eliminate it. If the air filter looks dirty or there are cobwebs in the corners, it might be clogged. If this case, you have to replace it. Next, look for leaks around the windows or vents. If you spot any, try to plug them. They can be the reason for the smell. The last step is to change the air filters in the unit. The manufacturer’s instructions will show you how to do it. Call a professional if the solutions do not work. An experienced technician can fix the problem for you.

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