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Mitsubishi Air Conditioner Problems: 7 Common Issues

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On a hot summer day, it’s pretty frustrating if your air conditioner stops working.

But, before you lose your cool, keep in mind that complications and problems can arise regardless of the brand and there are things you can do to get your air conditioner back up and running.

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If you find yourself in such a situation with your Mitsubishi AC, continue reading below.

Mitsubishi Air Conditioner Problems: 7 Common Issues (Must Read)

Here are 7 common problems with Mitsubishi air conditioners, along with their causes and solutions.

This is not to say that if you buy a Mitsubishi air conditioner, you will have these problems.

These are the most commonly experienced problems.

Not too dissimilar to other air conditioner brands

Mitsubishi AC Not Cooling

From time to time, Mitsubishi air conditioners can stop cooling the air they blow out

If your Mitsubishi Air Conditioner is not cooling, not blowing cool air it’s likely to be a clogged air filter or defective thermostat.

However, you don’t need to worry, as reading the causes and solutions below might help you solve the issue.

Possible Solution(s):

Thermostat

If your Mitsubishi air conditioner is blowing hot air, the thermostat may have been set to “heat” by mistake. If this is the case, it’s a simple remedy that you can do on your own.

Simply turn the thermostat to “cool” and observe if the air conditioner starts to blow cool air once more.

Check the thermostat and make sure it is set to “cool” and at the proper temperature. If it needs new batteries, replace them.

Check the thermostat and make sure it is set to “cool” and at the proper temperature. If it needs new batteries, replace them.

Dirty Filter

A dirty air filter can lead to a dirty evaporator coil, even though air filters have nothing to do with air temperature.

There may not be enough free airflow to allow for efficient cooling operation if the evaporator coil becomes blocked with dust and debris.

Debris build-up from a filthy air filter can cause frozen evaporator coils.

Although you may believe that “frozen” equals “cold,” the frozen coils actually obstruct the flow of cool air, causing warm air to flow from the running engine instead.

Depending on the environment, filter type, and home, air filter change should be done every 30-60 days by the owner.

Setting a monthly reminder to check the condition of your air filter is recommended.

Mitsubishi AC Not Turning On

At times, your Mitsubishi AC won’t turn on, no matter what buttons you press.

If that’s the case, Mitsubishi AC not turning is typically caused by a simple power failure or tripped circuit. 

Try not to fret, instead work through the steps below

Possible Solution(s):

  • If you’re lucky, your AC might be having trouble turning on only due to a simple power failure such as a loose power cable or a tripped circuit breaker.
  • So, check the main power cable of your AC along with its circuit breaker switch, making sure both are in place.
  • If the AC appears to be getting a constant supply of electricity, then the problem might be inside your AC’s system.
  • Your AC may have some broken wires that are not allowing current to pass.
  • To fix this issue, you will need to call a professional.

Best to connect with an Appliance Repair Technician who can help you resolve this issue.

Connect with an Appliance Repair Technician
Click here to use the chatbox to speak with one of our skilled technicians
No in-home service calls. No appointments.

Mitsubishi AC Blowing Warm Air

It can be quite frustrating when your AC blows hot, as it can ruin the temperature of your entire home.

Mitsubishi AC blowing hot air is typically caused by an incorrect thermostat or an issue with the compressor. 

However, you can deal with this issue by reading the causes and solutions below.

Possible Solution(s):

  • Typically, this problem can be easily fixed by simply checking the thermostat settings.
  • If your thermostat has been switched to “on” instead of “cool” or “auto,” the AC will constantly blow air even if it isn’t cooling
  • Changing this setting will allow your AC to start cooling again.
  • If the thermostat settings appear to be fine, the problem may be with your compressor.
  • To test the compressor, turn off the AC for at least 30 seconds and listen to the sound of the compressor starting after turning the AC on.
  • If the compressor doesn’t start after a few minutes, you will need to replace it. 

Best to connect with an Appliance Repair Technician who can help you resolve this issue.

Connect with an Appliance Repair Technician
Click here to use the chatbox to speak with one of our skilled technicians
No in-home service calls. No appointments.

Mitsubishi AC Working at the Wrong Temperature

If you’re noticing your Mitsubishi AC is working at temperatures you didn’t set, you may be facing a common problem.

Mitsubishi AC working at the wrong temperature is typically caused by a faulty thermostat. 

Continue reading to find the solution to your issue.

Possible Solution(s):

  • The thermostat is the main component of your AC that controls the temperature.
  • With the thermostat broken, your AC will have trouble functioning at the right temperature.
  • However, testing and replacing the thermostat can be complicated, so call in a professional to do the work for you.
  • In case the thermostat has been tested to work properly, the reason behind an inaccurate AC temperature may be a refrigerant leak.
  • To handle this issue, you will need to call a professional.

Best to connect with an Appliance Repair Technician who can help you resolve this issue.

Connect with an Appliance Repair Technician
Click here to use the chatbox to speak with one of our skilled technicians
No in-home service calls. No appointments.

Mitsubishi AC is Leaking Water Excessively

It’s expected for a Mitsubishi AC to produce water through condensation.

However, if you start to notice water puddles and excess water leakages, there’s something wrong with your AC.

Mitsubishi AC leaking water excessively is typically caused by a dirty air filter or blocked pipe 

Continue reading to find out what may be wrong and how to fix it. 

Possible Solution(s):

  • A dirty air filter will block the flow of air, causing coils inside the AC to freeze when the frozen components thaw, and excess water starts to leak outside the AC.
  • So, open your AC unit and clean your filter thoroughly to reduce water leakage.
  • A PVC pipe known as a drain line is used to move the condensation outside in a drain.
  • However, if this pipe becomes clogged, the water can start to leak elsewhere.
  • Check the drain line for blockages and remove them to fix your AC.

Best to connect with an Appliance Repair Technician who can help you resolve this issue.

Connect with an Appliance Repair Technician
Click here to use the chatbox to speak with one of our skilled technicians
No in-home service calls. No appointments.

Mitsubishi AC Unresponsive to Remote Control

The remote control is a useful tool for changing the settings of your Mitsubishi AC.

However, it can be a frustrating problem when the AC doesn’t respond to it.

Unresponsive Mitsubishi AC remote control is typically caused by low batteries or problems with the main control board

To deal with this problem, refer to the causes and solutions mentioned below.

Possible Solution(s):

  • The reason why your AC doesn’t respond to the remote control could just be low battery.
  • So, a quick fix to this problem is to simply replace the batteries in your remote control.
  • The main control board of your AC contains an infrared receiver to catch the signals coming from the remote control.
  • If the receiver fails to function, the AC won’t be able to respond to the remote control.
  • To fix the receiver, you will need to open the unit and replace the main control board.

Best to connect with an Appliance Repair Technician who can help you resolve this issue.

Connect with an Appliance Repair Technician
Click here to use the chatbox to speak with one of our skilled technicians
No in-home service calls. No appointments.

Mitsubishi AC Weak Airflow

From time to time, your Mitsubishi AC will function but with little to no airflow.

Mitsubishi AC having weak airflow is typically caused by obstruction or dirt in the vents or filters. 

However, this problem can usually be easily dealt with.

Continue reading the causes and solutions below to solve your problem.

Possible Solution(s):

  • Weak airflow is usually due to some obstruction inside the outdoor or indoor vents.
  • Open the vents and clean them thoroughly to allow optimal airflow.
  • Additionally, clean the air filter as well to allow air to pass through it with ease.
  • If the vents and filters appear to be clean, the fan may have a problem.
  • Open the AC unit and look for obstructions between the fan blades.
  • Furthermore, tighten the fan axle if it appears to be loose.
  • If the AC still has weak airflow, the fan motor may need to be replaced.

Best to connect with an Appliance Repair Technician who can help you resolve this issue.

Connect with an Appliance Repair Technician
Click here to use the chatbox to speak with one of our skilled technicians
No in-home service calls. No appointments.

Mitsubishi AC is Making Noise

Sometimes your Mitsubishi AC might produce more noise than expected.

Mitsubishi AC making too much noise is typically caused by dirt or debris caught inside your air conditioner. 

This is a common problem and can be solved easily by reading the below-mentioned causes and solutions.

Possible Solution(s):

  • One of the most common culprits behind noise is debris inside the AC.
  • Open up your unit and check for debris stuck inside fans, filters, and other areas.
  • Removing the debris will significantly reduce the extra noise
  • Fan motors contain ball bearings that can produce noise when their lubrication wears off.
  • To reduce this noise, you will need to replace the fan motor or the ball bearings inside. 

Best to connect with an Appliance Repair Technician who can help you resolve this issue.

Connect with an Appliance Repair Technician
Click here to use the chatbox to speak with one of our skilled technicians
No in-home service calls. No appointments.

Mitsubishi AC Produces an Unpleasant Smell

Rarely this happens, but Mitsubishi AC producing an unpleasant smell is typically caused by mold or refrigerant leak. 

A refrigerant leak is likely if your mini-split smells like fish, or vinegar or has a sweet odor.

A lack of chilled air is another tell-tale sign that you don’t have enough refrigerant.

If you’re dealing with this issue, it’s best to use some of the solutions mentioned below as soon as possible.

Possible Solution(s):

  • If your AC has been spreading an unpleasant smell, it could be due to the presence of mold.
  • After all, the humid internal environment of an AC is the perfect place for mold to grow.
  • You will need to contact a professional to get rid of the mold for you.
  • If mold isn’t a problem and your AC is still spreading a bad smell, your Mitsubishi AC might have an issue with its components.
  • Overheated parts can easily spread a burning smell.
  • Additionally, a gas leak can produce the smell of rotten eggs.
  • To fix faulty components, call in a professional.

Connect with an Appliance Repair Technician
Click here to use the chatbox to speak with one of our skilled technicians
No in-home service calls. No appointments.

Conclusion

If you’re looking for an AC unit, Mitsubishi is a brand worth considering. 

While Mitsubishi offers reasonably priced, well-built air conditioners with a variety of features, you will eventually encounter a problem.

In that case, the solutions mentioned above will be quite helpful.

So, keep them in your mind and maintain your Mitsubishi AC in good condition at all times.

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