Why And How To Remove Moisture From Car AC System?[Explained]

As an Amazon Associate, We may receive a commission for purchases made through links in the post at no additional cost to you.

Are you struggling to get rid of moisture from your car AC system? If so, you came to the right place! Moisture build-up inside car air conditioners can cause a variety of problems, including musty smells, decreased cooling efficiency, and even costly damage. But, there are several simple steps you can take to get rid of this moisture and get your car’s AC running like new.

Here, we will discuss how to remove moisture from Car AC system, as well as the benefits of doing so. Read on to learn more.

Causes of Moisture in Car AC System

  1. Low Refrigerant – A car’s AC needs a certain level of refrigerant to circulate cool air. If it is low, the evaporator coils may freeze, the condensate drain pan may overflow and leak, and hot air may come out of the vents. Low levels can also cause the evaporator to work inefficiently and collect more moisture.
  2. Condensation of Water Vapor – Any air conditioning system in a car is cooled by a refrigerant. As it passes through the system, it absorbs heat and takes in moisture from the air inside the car. When the refrigerant is cooled below the dew point, the moisture condenses on the inside surfaces of the component parts.
  3. Leaks in the AC System – Leaks in the AC system can be caused by improper installation or damage to hoses and seals. Leaks allow moisture to enter the system, leading to higher humidity levels inside the vehicle.
  4. Blocked Air Filters – Using a car’s air conditioning (AC) system can result in the air filters becoming clogged with dirt and debris over time, which can in turn freeze up the evaporator coils and cause an excessive water leak
  5. Malfunctioning Components: If the components of the refrigerant system are not working properly, it can cause the system to run inefficiently, leading to more moisture in the air conditioning system.
  6. Failed Compressor – Yes, a failed compressor can cause moisture to enter the car AC system. A compressor that is not working properly can cause a refrigerant leak, which can introduce moisture into the system and create condensation. This can lead to other issues such as mold, bacteria, and mildew in the air conditioner.

You May also Like: 10 Reasons Portable Air Conditioner Compressor Keeps Shutting Off

How To Prevent Moisture Build-Up In Your Car’s AC System

Use Dehumidifiers – Yes, car dehumidifiers can be effective in reducing the humidity level inside a car. They help keep your car windows from getting foggy, which is important for keeping you safe in cold weather. They are designed to absorb moisture from the air and help prevent condensation from forming on windows, mirrors, and other surfaces. Some models of car dehumidifiers may also help reduce the musty smell caused by excess moisture. They also make the air in your car cleaner, which can help with allergies.

Take a look at some of the most popular car dehumidifiers. From convenient, compact designs to powerful, efficient options, you will find a dehumidifier for your car that will help keep your car interior dry and comfortable.

Eva-dry E-333 Renewable dehumidifier

Pro Breeze Wireless Mini Dehumidifier for Cars

Where you can place a dehumidifier in a car – Dehumidifiers can be placed in a variety of locations in your car, depending on your needs. You can easily place it under the seats, inside the glove box, or on the dashboard of your car to keep the air dry, prevent mold growth, and reduce musty odors.

Check the air filter and clean Blockages – To ensure your AC system is running smoothly by checking the air filter and searching for blockages. Take a quick look at the air filter; if it’s clogged with dust or other particles, swap it out or clean it (if possible) so you get maximum airflow.

Check the Refrigerant Levels Recharge the AC SystemCheck refrigerant levels with a gauge attached to the low and high-pressure lines. If the pressure is too low, recharge the system by turning the car off and allowing it to cool down. 

Replace the Compressor with a New One – Another way to get rid of moisture in your car’s AC system is by replacing the compressor. This will not only make your AC run better but also more efficiently. For this, find a new compressor that fits both your car and budget by checking the size, type, power requirements, and refrigerant charge.

We always recommend a technician if you want to replace the compressor. They can inspect the system to determine what’s causing moisture, and then recommend the next steps. A technician can help you select the most compatible compressor for your car and save you time and money. Also, they will be able to install the compressor correctly to maintain optimal performance and dependability.

Find Leaks – As we discussed above, coolant leaks can allow moisture to enter the system and can be a serious issue for car AC. They can lead to damage of major components or even shutdown of the whole system.

To prevent this problem is to check for coolant leaks regularly. You should visually inspect the hoses that connect the radiator to the engine and the AC condenser for any signs of leaking or damage. Also, if you notice any stains underneath the car, it is likely a sign that there is a coolant leak. A refrigerant leak detector can help you find other potential leaks.

If you find a coolant leak, take action immediately by replacing the damaged component or using a sealant. As always we also recommend that you visit a technician to assist with resolving the issue as soon as possible.

You May Also Like: How Many Hours Should AC Run Per Day?

Run the AC on full powerYes, running the AC on full power can help you remove moisture from the car AC system. Running the AC at full power will cause the evaporator to get cold and cause condensation to form that will then be drained out. This will help to remove any moisture or dirt that has built up in the AC system.

Use a solventYes, a solvent can help to get rid of moisture from the car AC system. There are several products available on the market specifically designed to help remove moisture from AC systems. These products are typically sprayed into the system and help to absorb the moisture, leaving the system dry and free of moisture.

Use moisture absorber – Using a moisture absorber is an effective way to get rid of moisture from a car’s air conditioning system. A moisture absorber, such as a desiccant or silica gel packet, can absorb the moisture and help keep the system dry and functioning properly. To use a moisture absorber, simply place the packet and leave it for a period of time. Depending on the amount of moisture in the system, you may need to change the package out every few weeks. If you notice an excessive amount of moisture in the system, you may need to replace the package more often.

Check out some of our most popular moisture absorbers. Take a look at our selection and find the perfect one for you.

Vacplus Moisture Absorber

ZARPAX Car Dehumidifier Bag

BARSKA Safe Moisture Absorber

Signs That Your Car’s AC System Has Too Much Moisture

The following signs suggest that your car’s AC system has an excess of moisture :

  • Musty Odors – If your car’s AC system is producing a musty odor, it may be due to excess moisture. This is often caused by mold or mildew growth in the system.
  • Poor Airflow and Performance – If you notice your AC system isn’t cooling or poor airflow from your AC vents, it may be due to excess moisture in the ducts. This usually happens when condensation or water collects in the ducts and blocks the air.
  • High Humidity or Foggy Windows – The windows fog up or steam up when the car is turned on and the air conditioning is running. Also, excess humidity in your car may be due to water leaking from the AC and vaporizing into the cabin.
  • Frozen Evaporator Coil – A frozen evaporator coil could be a sign of too much moisture. This is usually caused by condensation from the coil freezing and blocking the airflow.

Benefits Of Removing Moisture From Car AC System

  1. Improved Air Quality – Moisture and other contaminants in your AC system can lead to a musty, moldy odor in your car’s interior. By removing the moisture, you can improve the quality of air in your car, making it more pleasant to be inside. 
  2. Longer AC System Lifespan – Excess moisture in an AC system can cause components to rust and corrode, leading to more frequent and costly repairs. By removing the moisture, you can help extend the life of your AC system and save money in the long run.
  3. Increased Efficiency – Moisture in your AC system can reduce its efficiency by making the system work harder to cool the air. Removing the moisture can help increase efficiency and make it easier for your AC system to do its job.

6 Simple Tips And Tricks To Keep Your Car’s AC System Moisture Free

  • Have your air conditioning system serviced regularly.
  • Change your air conditioning system’s air filter at least once a year.
  • Check for any leaks in the air conditioning system.
  • Keep the air vents and fan clean.
  • Switch off the fan and open the windows when the car is parked in hot weather.
  • Use a cleaner specifically designed for air conditioning systems to get rid of dust and other debris.

Let’s Wrap Up

So, now you know why and how removing moisture from your car’s AC system is important to keeping your car AC running at its best. It is also important to know how long it takes to get cold your AC system to recharge.

To know more check – How Long Does It Take for Ac to Get Cold After Recharge? – Best Answer

As an Amazon Associate, We may receive a commission for purchases made through links in the post at no additional cost to you.

You May Also Like:

  1. Running AC Compressor Without Oil

Let Us Know How We’re Doing!

Did this expertly prepared resource answer your question?

Do you have another question about home maintenance, home improvement projects, home appliance repair, or something else?

Get more information, send in questions and keep the discussion going by contacting the I’ll Just Fix It Myself company customer service team at at 1-800-928-1490 or Email us at [email protected]