How To Reset Mr Cool Mini Split: A Step-by-Step Guide

How To Reset Mr Cool Mini Split


If you own a Mr Cool mini split system, you may occasionally encounter issues that require you to reset the unit. Resetting your Mr Cool mini split is a simple process that can help resolve common problems such as freezing, unresponsiveness, or incorrect temperature readings. In this guide, we will walk you through the steps to reset your Mr Cool mini-split.

Steps To Reset Your Mr. Cool mini-split:

How to reset mr cool mini split

Step 1: Locate The Power Button:

The first step is to locate your Mr Cool micro split’s power button. The power button is usually located on the indoor unit or the remote control. It is typically labeled with a power symbol or the word ‘Power’.

Step 2: Turn Off The Power:

Once you have located the power button, press and hold it for approximately 5 seconds to turn off the power to the unit. This will initiate the reset process.

Step 3: Wait for 10 Minutes:

After turning off the power, it is important to wait for at least 10 minutes before proceeding to the next step. This will allow the unit to fully reset and clear any residual power.

Step 4: Turn On The Power:

After the 10-minute wait, press the power button again to turn on the power to the unit. You should see the display light up, and the unit should start running.

Step 5: Set The Desired Settings:

Once the unit is powered on, you can set the desired settings such as temperature, fan speed, and mode. Use the remote control or the buttons on the indoor unit to adjust these settings.

Step 6: Test The Unit:

After setting the desired settings, it is important to test the unit to ensure that it is functioning properly. Check if the air is flowing correctly, the temperature is accurate, and the unit is responding to your commands.

This basic reset should restore your Mr Cool Mini Split to its default settings. If you were experiencing minor issues, they should now be resolved. If not, proceed to troubleshoot common problems.

Troubleshooting Common Problems:

Troubleshooting Common Problems

1) No Power:

If your Mr. Cool mini split system is not turning on, the first thing to check is the power supply. Check to see whether the circuit breaker hasn’t tripped and that the appliance is correctly plugged into a functioning electrical outlet. If the power source is functioning properly, check the remote control batteries and replace them as necessary.

2) Poor Cooling Or Heating Performance:

If your Mr. Cool mini-split system is not cooling or heating your home effectively, there could be a few reasons for this. First, check the air filters and clean or replace them if they are dirty. Filters that are clogged might limit airflow and affect how well the system works. To further reduce air leaks, ensure that all windows and doors are properly sealed.

3) Strange Noises:

If you notice any unusual noises coming from your Mr Cool mini split system, it could indicate a problem. Rattling or banging noises may be caused by loose parts or debris inside the unit. In this situation, it is best to get in touch with a qualified specialist to look over and fix the system. Squealing or hissing noises could be a sign of a refrigerant leak, which also requires professional assistance.

4) Remote Control Issues:

Checking the batteries should be your first step if your Mr. Cool mini-split system is not responding to the remote control. Replace them if necessary. If the batteries are fine, make sure that there are no obstructions between the remote control and the unit. Check for any more gadgets in the area that might be interfering as well.

5) Water Leaks:

If you notice your Mr. Cool Mini Split leaking water inside, it could be due to a clogged condensate drain line. Locate the drain line and use a vacuum or a small brush to remove any debris or blockages. To prevent further harm to the system, it is advised to seek professional assistance if the issue persists.

Advanced Reset Options:

For more advanced troubleshooting and reset options, consult the user manual provided with your Mr. Cool Mini Split system. The manual may contain specific instructions for factory resets, error code resets, or other advanced procedures.

If none of the above steps resolve your issues, it’s advisable to contact a certified HVAC technician or Mr. Cool customer support for professional assistance. Attempting complex repairs without proper knowledge can lead to further problems. 

Regular Maintenance Of Mr Cool Mini Split:

Regular Maintenance Of Mr Cool Mini SplitTo prevent issues and ensure your Mr Cool Mini Split system operates efficiently, consider performing regular maintenance:

Cleaning: Clean or replace air filters every 1-2 months or as recommended in the user manual. Dirty filters can reduce system efficiency. Learn how to clean your Mr. Cool Mini Split for optimal performance.

Inspection: Regularly inspect the indoor and outdoor units for debris, leaves, or other obstructions. Keep the area around the outdoor unit clear.

Coil Cleaning: Have a professional technician clean the evaporator and condenser coils annually. Dirty coils can affect performance.

Refrigerant Levels: Schedule periodic checks of the refrigerant levels to ensure there are no leaks or deficiencies.

Professional Maintenance: Consider an annual maintenance visit from a certified HVAC technician to inspect and service your Mini Split system thoroughly.

Safety Precautions:

When working with electrical appliances, always prioritize safety:

  • Disconnect power sources before performing any maintenance or reset procedures.
  • If necessary, put on the proper protective gear, such as gloves and safety glasses.
  • If you’re unsure about any aspect of the reset or maintenance process, seek professional help to avoid accidents or damage to the system.

Frequently Asked Questions:

How Do I Reset My Mr Cool Mini Split?

To reset your Mr Cool Mini Split, start by turning off the unit and unplugging it from the power source. Wait for at least 10 minutes before plugging it back in and turning it on again.

Why Do I Need To Reset My Mr Cool Mini Split?

Resetting your Mr Cool Mini Split can help resolve various issues such as freezing, unresponsiveness, or error codes. It essentially refreshes the system and allows it to start afresh.

How Often Should I Reset My Mr Cool Mini Split?

There is no set frequency for resetting your Mr Cool Mini Split. It is recommended to reset it only when you encounter problems with its performance or functionality.

Will Resetting My Mr Cool Mini Split Delete My Settings?

No, resetting your Mr Cool Mini Split will not delete your settings. It simply restarts the system without affecting your customized settings.


In conclusion, knowing how to reset a Mr. Cool Mini Split system and perform basic maintenance can help you maintain its efficiency and address common issues. However, for complex problems or if the basic reset and troubleshooting steps don’t work, it’s best to rely on professional assistance to ensure your system runs smoothly and efficiently for years to come. Regular maintenance and timely repairs can extend the lifespan of your Mini Split system and provide you with comfortable indoor environments throughout the year.
It’s essential to underscore the significance of regular maintenance to uphold the longevity and efficiency of your Mr Cool Mini Split system. Beyond just troubleshooting and resetting, proactive measures like consistent cleaning, inspection for debris, and annual professional maintenance are pivotal. Regularly cleaning or replacing air filters, inspecting units for obstructions, and scheduling coil cleanings can substantially enhance the system’s performance and mitigate potential issues. Additionally, keeping an eye on refrigerant levels and seeking professional maintenance annually further safeguards against unexpected malfunctions. By adhering to these maintenance practices, you not only ensure optimal functionality but also extend the lifespan of your Mr Cool Mini Split system, providing sustained comfort and peace of mind for years to come.

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About the author


I am Ben , a seasoned HVAC specialist with over 6 of experience in the HVAC industry. I holds HVAC Certification and has a proven track record in providing expert advice on HVAC systems.