9 Mitsubishi Electric Air Conditioner Blinking Green Light

Dealing with appliances was easy before. With the advancement in technology, more issues are being faced by the users now. They find it difficult to operate the latest appliances. Have you ever found yourself in such situations where you couldn’t figure out the actual cause of an appliance error? If yes, then we can feel you.

Mitsubishi users often find their Mitsubishi Electric Air Conditioner Blinking Green Light. But they don’t know what it is about. Know this tip that if your Mitsubishi electric AC is blinking green light then it means there is something that you need to know. It could be one of the following things.

  •       Indication of an overvoltage
  •       Multi-split setting fault
  •       Clogged AC filters
  •       Damaged cord
  •       Obstructed fan
  •       Low refrigerant
  •       Electric fault
  •       Faulty compressor
  •       Temperature troubles

The blinking green light should disappear once you reset your AC. But if it keeps happening then it is time to call the technician at your earliest.

8 Reasons Mitsubishi Electric Air Conditioner Blinking Green Light

As mentioned before, if you witness a blinking green light then reset your AC but if it doesn’t help then you can consider other reasons for its occurrence. Here in this section, we will be discussing the 8 reasons why a blinking green light is witnessed along with their fixes.

Mitsubishi Electric Air Conditioner Blinking Green Light
Mitsubishi Electric Air Conditioner Blinking Green Light


If your Mitsubishi AC is blinking green-light then it is indicating an over-voltage. These ACs are built using an advanced and latest technology so they know when there is a power fluctuation. Once an over voltage is detected, the green light starts blinking, informing the user to let the AC cool down in order to protect the unit.  The resetting can be done in either of the two ways; self-shut down or a forceful shut-down.

Fix method

To fix the over-voltage issue you need to shut down the whole unit. If you allow the unit to shut-down automatically then it will take time and can cause damage. So it is recommended to shut down the unit forcefully.

Reset method

  •       Find the isolator switch of your unit and turn it off
  •       Wait for exactly 20 seconds
  •       Now switch it ON


  •       Keep the AC unplugged for at least 20-25 seconds and then plug back in

If you want to use the remote for resetting then keep pressing the reset/power button on the remote for about 5 – 10 seconds.

Multi-split setting fault:

If you have multiple ACs present then it could cause an imbalance. The reason is some of the ACs would be providing cool air while the rest would be providing heat. This could be really confusing. During this time, the unit itself gets confused and as a result it starts blinking a green light.

Mitsubishi Electric Air Conditioner Blinking Green Light
Mitsubishi Electric Air Conditioner Blinking Green Light

Fix method

Reset the AC to make the green light disappear. If this method doesn’t help then call a technician to get your issue resolved and have guidance accordingly.

Obstructed fan:

Sometimes it is the fan that is causing the problem. It might have something stuck in it like dirt, debris etc. Do check the fan first before trying anything else. If you find something causing an obstruction then remove it as soon as possible to allow the AC to blow cool air.

Fix method

Check if there is something stuck inside the fan. If so, remove it and restart your AC afterwards.

Damaged power cord:

The main power source of your AC is a power cord. The power flows through it. If it is damaged then the power will not flow properly. Even if it does, it won’t do it for a long period of time. Moreover, it can also cause safety risks. So it is better to get it replaced.

Fix method

Check the power cord physically to find any damage. If it is physically okay then test it with a multimeter. If there is continuity then it means the power cord is okay but if not then it means the power cord is damaged and needs a quick replacement.

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Low refrigerant:

You will see a green light blinking whenever the refrigerant or coolant level is low. When this happens the compressor gets burdened and struggles to work. This will cause the AC to shut down now or later. This happens due to the leakage at the time of damage or poor installation.

Fix method

If you want to solve this issue on your own then it is not possible until and unless you are an expert. You can contact an expert technician to check and fix the refrigerant level.

Clogged filters:

If the AC filters are clogged then the AC won’t provide cool and clean air. This will highly affect the cooling power of your AC. The filters should be clean as they can become a cause of other problems as well. Additionally, it is recommended to get your AC filters replaced after 6 – 12 months.

Fix method

Check whether the filters are clean or dirty. If they are dirty then clean them and if they are old enough then make a quick replacement.

Faulty compressor:

A compressor struggles to work when the refrigerant level drops low. This is when the compressor starts to become faulty. So the problem might not be in the compressor but in the refrigerant level.

Mitsubishi Electric Air Conditioner Blinking Green Light
Mitsubishi Electric Air Conditioner Blinking Green Light

Fix method

By now, you must be familiar with the problems that need to be dealt with by experts. This problem is one of them. Call a technician to know whether the issue is in the compressor or the refrigerant level. If the issue is the first one then you need to replace the AC unit.

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Electric fault

The blinking of a green light might also be an indication of an electric fault. The unit could be experiencing an insufficient power supply or might have wiring issues. But handling any of these issues on your own is a safety hazard. You don’t want to get yourself included in all this stuff.

Fix method

Call an electrician if the issue is related to electricity. Don’t try anything on your own because it might be a great risk for your life.

Temperature troubles

Sometimes the green light might blink to indicate you regarding temperature. More specifically it informs you that the targeted temperature isn’t achieved. It could occur due to low refrigerant level and poor insulation.

Fix method

You need to schedule an appointment for the maintenance service of your AC. Moreover, look for the adequate insulation options.

Frequently Asked Questions:

Mitsubishi AC light is blinking, why?

You can witness a blinking light on your AC because of the following reasons.

  •       Clogged filter
  •       Obstructed fan
  •       Failing compressor
  •       Electric fault
  •       Over-voltage
  •       Low refrigerant
  •       Faulty power cord
  •       Multi-split fault

What does a green light on a Mitsubishi mini split do?

Whenever you see a green light blinking on a Mitsubishi mini-split, it means that the heat pump is ready to attain the pre-set temperature. This happens when the indoor temperature fluctuates by 20 degree Celsius. To solve this, you need to readjust the temperature of your thermostat.

How to solve a blinking green light issue?

A – A blinking green light issue can easily be solved by simply resetting your AC. If this doesn’t help then it is time to call an expert or technician.


In a nutshell, there are a total 8 possible reasons for the occurrence of a blinking green light. If it happens then you can test for different issues and whichever one seems to be causing the problem, apply its relevant fix. 

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