Troubleshooting Mr. Cool Double Dash Error: Solutions And Fixes

Mr. Cool Double Dash Error

Air conditioners are essential for keeping our homes cool and pleasant. One popular brand in the market is Mr. Cool, known for its efficient cooling and user-friendly features. However, like any electronic device, it is not immune to occasional errors or malfunctions. One such error that users might encounter is the Double Dash Error.

What Is The Mr. Cool Double Dash Error?

The Double Dash Error on a Mr. Cool Air Conditioner is an indication that there is an issue with the system’s communication. It typically appears on the unit’s display panel as two dashes (–). This error can frustrate users, especially during hot summer days when a functioning air conditioner is essential.

Possible Causes Of The Double Dash Error

There can be several reasons why the Double Dash Error occurs on a Mr. Cool Air Conditioner. Let’s take a look at some of the common causes:

  1. Communication Failure: The Double Dash Error often occurs when there is a communication failure between the indoor and outdoor air conditioner units. This can be due to issues with the wiring, faulty sensors, or a malfunctioning control board.
  2. Power Interruption: Another possible cause of the Double Dash Error is a power interruption. If the air conditioner loses power abruptly or experiences voltage fluctuations, it can trigger this error.
  3. Defective Parts: Faulty components or defective parts within the air conditioner can also lead to the Double Dash Error. It could be a malfunctioning temperature sensor, a faulty compressor, or a problem with the fan motor.

Troubleshooting The Mr.Cool Double Dash Error

If you encounter the Double Dash Error on your Mr. Cool Air Conditioner, here are a few troubleshooting steps you can try:

  1. Reset the Unit: Reset the air conditioner first. Please disconnect the device from the power source, switch it off, wait a few seconds, and then plug it back in. This simple reset can often resolve minor communication issues.
  2. Check the Wiring: Inspect the wiring connections between the indoor and outdoor units. Verify that every wire is securely attached and undamaged. You will need to replace or fix any loose connections or frayed wires you uncover.
  3. Power Supply: Verify that the air conditioner receives a stable power supply. Look for any blown fuses or tripped circuit breakers. To solve any electrical problems, seek the advice of an electrician if necessary.
  4. Contact Customer Support: If the Double Dash Error persists after trying the above steps, it is advisable to contact the customer support of Mr. Cool. They can set up a qualified technician to identify and resolve the issue or offer more advice.

Preventing Future Errors 

To prevent future occurrences of the double dash error on your Mr. Cool air conditioner, consider the following tips:

  • Schedule regular maintenance: Regular maintenance performed by a qualified HVAC expert can help find and fix possible problems before they become more serious.
  • Keep the unit clean: Ensure the outdoor unit is clear of any dirt, leaves, or other obstructions affecting its functionality.
  • Follow the manufacturer’s guidelines: Read and follow the user manual provided by the manufacturer. It contains important information on maintenance and troubleshooting specific to your Mr. Cool air conditioner model.

Frequently Asked Questions

Can I fix The Double Dash Error Myself?

While it’s possible to fix the double dash error yourself, seeking professional help is recommended, especially if you’re unfamiliar with air conditioning systems. A qualified technician will have the knowledge and tools to diagnose and resolve the issue safely.

How Long Does It Take To Fix The Double-Dash Error?

Fixing the double-dash mistake may take a while, depending on the root reason and degree of difficulty. Sometimes, it may be a simple fix that can be resolved within a few minutes. However, if there are underlying wiring or control board problems, it may take longer to resolve.

Can Extreme Temperatures Trigger The Double-Dash Error?

Extreme temperatures can trigger double-dash errors, especially if the air conditioner is exposed to excessive heat or cold. It’s crucial to remember that the error could also be caused by electrical problems or electronic interference.


The Mr. Cool Air Conditioner double dash error can cause concern. Still, understanding its meaning and following the appropriate troubleshooting steps can effectively resolve the issue. Remember to prioritize regular maintenance and follow the manufacturer’s guidelines to prevent future errors and ensure the optimal performance of your air conditioner.

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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.