ClickCease DIY mini-split cleaning: How to clean your MRCOOL unit – FrosthubUSA

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DIY mini-split cleaning: How to clean your MRCOOL unit

If you own an air conditioner, you know how essential it is to keep it clean and well-maintained. A clean air conditioner not only provides great air comfort but also consumes less energy, making it an ideal system for your living space. However, when it comes to cleaning a ductless heat pump or a mini-split system, it can be a major obstacle for many homeowners. But don't worry, with the right tools and detailed instructions, you can easily clean your MRCOOL DIY ductless mini-split and maintain its high efficiency heat pump.

Cleaning Your MRCOOL DIY Ductless Mini-Split


MRCOOL DIY series heat pump is a great air conditioner that provides high efficiency cooling and heating. It is a ductless system that is easy to install with quick hook-up features, and it operates silently in the auto mode, cool mode or heat mode. However, to maintain its optimal performance, it's important to clean it regularly. In this article, we will discuss the step-by-step process of cleaning your MRCOOL unit without any professional help.

Why Clean Your Mini-Split System?

Maintaining a clean mini-split system is crucial for efficient operation and durability. Dust and dirt buildup on the air filter, coils, and fins can restrict airflow and cause reduced performance and higher energy consumption.

If you plan to clean your MRCOOL DIY mini-split system, proper registration is necessary to avail of the limited lifetime warranty. You may also want to consider signing up for the MRCOOL Care Kit program to maintain the system's original condition.

To learn more about properly registering your unit and taking advantage of the limited lifetime warranty, check out our guide on how to register your warranty.

Preparations before Cleaning

Before you start cleaning your MRCOOL DIY mini splits, there are a few things you need to take care of:

Turn off the Power

Turn off the power supply of your MRCOOL unit to avoid any electrical hazards during the cleaning process. You can switch off the power at the circuit breaker or disconnect the electrical connections.

Check the User Manual

Refer to the user manual that comes with your MRCOOL unit to understand the specific time and procedure for cleaning the indoor and outdoor units. It will also provide you with safety instructions and precautions that you need to follow during the cleaning process.

Wear Protective Gear

Wear protective gear for best efforts such as gloves and goggles to protect yourself from dust and debris.

Gather the Required Tools

To clean your MRCOOL unit, you will need the following tools:

  • Screwdriver
  • Soft brush or vacuum cleaner
  • Water spray bottle
  • Cleaning solution

Cleaning the Indoor Air Handler

Now that you have turned off the power supply to the indoor unit, you can start cleaning it. Begin by removing the filter panel. Depending on the model of your Mr. Cool unit, the filter panel may be located on the bottom or the top of the indoor air handler.

Once you have removed the filter panel, take out the air filters and clean them with a dry cloth. If the air filters are too dirty or damaged, you may need to replace them with new ones. You can refer to the user manual for specific instructions on how to replace the air filters.

Next, use a damp cloth to wipe the inside of the wall unit. Be sure to clean the blades of the fan and the coils as well. If you notice any debris or dust on the blades or coils, you can use a soft-bristled brush to remove them.

Cleaning the Outdoor Heat Pump Condenser

After cleaning the inside unit, you can move on to the outdoor unit. Start by turning off the power supply to the outdoor heat pump condenser. Then, remove the top grill of the outdoor condenser to access the fan and the coils.

Using a soft-bristled brush, gently remove any dirt, leaves, or debris from the fan and the coils. Be careful not to damage the fins on the coils. You can also use a garden hose to rinse the fan and the coils, but be sure to cover the electrical connections to prevent water from getting into them.

Cleaning the Drain Hose

The drain hose is an important component of your MRCOOL unit that helps to remove excess water from the indoor air handler. Over time, the drain hose can become clogged with dirt or debris, which can lead to water leaks or other issues.

To clean the drain hose, locate the end of the hose that is connected to the indoor unit. Use a small brush or a pipe cleaner to remove any dirt or debris that may be blocking the hose. You can also use a solution of water and bleach to clean the drain hose and prevent the growth of mold or bacteria.


Cleaning your MRCOOL mini-split unit is an important maintenance task that can help to improve the performance and efficiency of your air conditioner. With the right tools and some basic knowledge, you can easily clean your unit in just a couple of hours. By following the detailed instructions in this article, you can ensure that your MRCOOL DIY ductless mini split or DIY series heat pump continues to provide great air comfort and high efficiency heat pump performance for years to come.



Q: How often should I clean my MRCOOL mini-split unit?

A: It is recommended to clean your MRCOOL mini-split unit at least once a year to maintain its performance and efficiency.

Q: Can I clean my MRCOOL unit without special tools?

A: Yes, you can clean your MRCOOL unit using basic tools such as a soft-bristled brush, a dry cloth, and a damp cloth.

Q: Can I clean the filters with water?

A: No, it is not recommended to clean the filters with water as it can damage the filters. Instead, you should use a dry cloth to clean the filters.

Q: Do I need to hire a professional for cleaning my MRCOOL unit?

A: No, you can clean your MRCOOL unit yourself with the help of this article and the user manual. However, if you are not comfortable with performing the cleaning yourself, you can hire a professional.

Q: How can I tell if my MRCOOL unit needs cleaning?

A: If you notice reduced airflow, strange noises, or unpleasant odors coming from your MRCOOL unit, it may be a sign that it needs cleaning as soon as possible.

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