How To Reset A Mitsubishi Air Conditioner [In 4 Easy Steps!]

Resetting a Mitsubishi air conditioner unit can be helpful. It can prevent any major issue that may occur to the unit by resetting it. So how to reset it anyway? Well, let's get this answered below!

To reset your Mitsubishi air conditioner, you'll need to:

  1. Shut off the AC unit's power and the outdoor unit.
  2. Wait for at least 30 seconds up to one minute.
  3. Turn the power on again on both indoor and outdoor AC units.
  4. Turn your Ac unit using the remote or turn on the thermostat.

That was easy, was it? Continue reading as we address why your Mitsubishi AC unit is not cooling. We will also touch on some related questions that you might find interested. With that said, let's dive in!

Split air conditioner on a white wall - How To Reset A Mitsubishi Air Conditioner [In 4 Easy Steps!]

How Do I Reset My Mitsubishi Electric Controller?

Hand adjusting temperature on air conditioner with remote control, Working air conditioner for comfort temperature in home at hot summer

How Do I Reset My Mitsubishi Heavy Industries Air Conditioner?

You can use the remote controller to reset/restart the appliance three minutes after an unusual halt. The error sign should vanish, and the equipment should resume its operation.

Furthermore, you can also manually reset the unit by unplugging it from a power source. Also, turn off the isolator next to the outdoor unit or shut down your house’s power breaker from the electrical board.

Then let it pause for around 15 to 30 minutes.

How To Set Timer On Mitsubishi AC Remote Control

With the ease of remote control included with new air conditioning models.

You aren't going to face the hassle of controlling the AC unit anymore. Especially at night when you're going to sleep, you can set the time precisely to turn off your AC unit within 24 hrs.

To set the timer on your Mitsubishi remote to OFF, you'll have to:

  1. Tap the ON/OFF key.
  2. Hit the OFF TIMER key.
  3. Set your desired time using the sign 'Up' and 'Down' arrows.
  4. Once you're done setting your time, tap the SET key.

See this visual tutorial on YouTube:

How To Use The SLEEP TIMER Setup

This setting allows you to pre-set your machine to run for 30 to 240 minutes before turning it off.

For SLEEP TIMER setup, you'll need to:

  1. On the bottom part of the remote, press the SLEEP TIMER key.
  2. Set your desired SLEEP TIMER settings before turning them on.

NOTE: The amount of time displayed on the panel is described as "5H" for 5 hours, and so on.

How Do You Reset An Outdoor AC Unit?

If your air conditioner doesn't have a reset button, you can manually reset it by following these steps:

  1. Turn off the condenser power.
  2. Ensure to shut off the breaker box.
  3. Disable the system by unplugging the unit from the power supply board.
  4. Run a multimeter in the unit to ensure no current supply is left.
  5. Let it rest for 30 minutes.
  6. Turn on the breaker, then set your thermostat to COOL settings.

How Do You Reset A Mitsubishi Thermostat?

It may be required to reset your home's thermostat from time to time. Resetting your thermostat to its factory settings can help you overcome errors with programming, your HVAC system, or thermostat link problems.

Different thermostats have different methods for resetting them. Read the guidelines on your thermostat for better results.

To reset your thermostat, you'll have to:

  1. Find the power breaker that controls your HVAC system.
  2. Switch it to the OFF setting.
  3. Allow 30 seconds for the reset process to complete.
  4. Return the breaker to the ON position.
  5. Using your Thermostat, change the temperature setup to your desire.
  6. Check the system if it's working correctly.

Why Does My Air Conditioner Keep Turning Off?

Your air conditioner often turns off before reaching the temperature you set on the thermostat.

Short cycling is a common problem in which your air conditioner turns on and off constantly, which is bothersome and costly on your power bill.

Potential Causes

  • Overheating unit - This usually indicates a buildup of filth inside the compressor unit, but it might also indicate a refrigerant leak.
  • Damage thermostat - The wire on your thermostat may have been broken, or an electrical issue.
  • Poorly maintained unit - An air conditioner, as most experts suggest, regular maintenance at least once every 2-3 months.

Energy Efficient concept - Close up shot of split type air conditioner on the wall

Why Isn't My Mitsubishi AC Cooling?

A broken air conditioner can be a major headache if you live in a hot climate.

Here are the five reasons your air conditioner may not be working:

Poorly Maintained Outdoor Unit

Exposing your AC outdoor unit to rain, sunlight, and debris will require a regular check-up. If your air conditioner isn't cooling as it used to, inspect the outdoor unit.

Improperly Installed Air Conditioner

If your newly installed air conditioner isn't working correctly, it's likely because it's either tiny or too huge for your space.

Dirty Or Clogged Air Filter

Your air conditioner will not be as cool if the air cannot move in and out correctly. If your air conditioner is getting too hot, you should probably check the airflow.

See this Mitsubishi filter on Amazon.

Low On Freon/Refrigerant

The lack of refrigerant, or Freon, is a common reason for an air conditioner that isn't cooling. In addition, if your unit runs out of Freon, the air in your room will not be as cool as it was.

Broken Thermistor

The temperature you set with the remote controls how your air conditioner functions. The thermistor transmits a signal instructing the units to chill your room after setting up your remote.

Therefore, you will not be able to order your AC unit to chill your home with a broken thermistor.

Check out this thermistor on Amazon.

Why Is My Outdoor Air Condition Fan Not Turning On?

Split air conditioner on a white wall.

This is due to a faulty start capacitor or malfunctioning fan motor.

A capacitor is like a compact battery and cylindrical item that can store energy. Its function is to provide additional power to kick a fan motor to spin.

The motor circuit only uses a start capacitor for a second or two once it initially starts to run.

You have a faulty fan motor if the fan does not start spinning. However, you can check the fan axle for dirt that might tangle its motor and prevent it from spinning.

Why Is My Mitsubishi AC Light Blinking?

Woman turning on air conditioner with remote

Following an operational issue, the lights in the bottom right corner of your Mitsubishi AC unit may begin to blink. It is due to the built-in self-diagnosis feature that allows users and contractors to recognize a system failure quickly.

Let's see why this is happening below:

  1. A series of blinking - This is due to the AC unit louver's flap or clasp left not fully closed, so fixing it will stop the system from blinking whether no significant issues are going on.
  2. Blinking twice error - This would show if your indoor thermistor is having an issue, so when this occurs, check the thermistor if it needs a replacement or cleaning.
  3. Blinking three times - This is due to an indoor motor fan issue. However, a damaged indoor Printed Circuit Board (PCB) could be another issue.
  4. Seven blinks - It is due to a faulty outdoor unit PCB (there are 1-3 PCBs in your outdoor unit).

NOTE: We highly suggest hiring an expert for this procedure to ensure better job results.

To Wrap It Up

Air conditioner on wall background

Now that you know how to reset your Mitsubishi air conditioner unit. You also learned how to reset your remote control.

In addition, We've also addressed some major problems why your AC unit is not cooling.

Throughout this article, we are confident that you've gained the necessary knowledge to care for or maintain your air conditioner's unit properly.

Made it this far? Please check out these related helpful articles below!

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How To Reset Carrier Aircon [Even Without A Reset Button]

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