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How to reset the Mitsubishi Air Conditioner?

In the hot Australian summers having a reliable and best air conditioner is must. Mitsubishi is a trusted brand with its advanced cooling solutions and it also ensures comfort. Just like other appliances, Mitsubishi air conditioner can also have issues so we are providing you this guide to reset your Mitsubishi air conditioner and we are going to share the ten common problems that are restricting it from working properly and we are also sharing their solutions, We are also providing some helpful tips to prevent furture issues and to ensure that your air condiotiner should be working nicely.

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Resetting Your Mitsubishi Air Conditioner

  1. Identify the Reset Button’s Location:

Begin the resetting process by locating the reset button on your Mitsubishi air conditioner. This button is typically situated near the power cord or on the control panel. For precise information, refer to your unit’s user manual.

  1. Power Down the Unit:

Before engaging the reset button, ensure the air conditioner is completely powered off. Disconnect the power supply or use the remote control to turn off the unit.

  1. Press and Hold the Reset Button:

Once the unit is powered down, press and hold the reset button for approximately 5-10 seconds. This extended press duration is crucial to clear any residual system glitches and initiate a full system reset.

  1. Reconnect Power Supply:

After releasing the reset button, reconnect the power supply to the air conditioner. Ensure a secure connection to avoid any electrical issues.

  1. Power On the Air Conditioner:

With the power supply reestablished, turn on the air conditioner using the remote control or the unit’s control panel. This step activates the system with a fresh start after the reset.

  1. Observe System Response:

Pay close attention to the unit’s response after the reset. Check for any error codes on the display panel or listen for unusual sounds. This observation helps in identifying whether the reset has successfully addressed the issue.

  1. Test Cooling Functionality:

To confirm the effectiveness of the reset, allow the air conditioner to run for a short period. Feel the airflow and monitor the cooling performance. If the issue persists, consider exploring additional troubleshooting steps or seeking professional assistance.

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Understanding the significance of each step in the resetting process empowers users to confidently navigate the procedure. Remember to exercise caution, follow safety guidelines, and consult the user manual for specific instructions tailored to your Mitsubishi air conditioner model.

Common Issues and Solutions

  1. Faulty Wiring:

Inspect the wiring for any damage or loose connections. If identified, consult a professional technician to repair or replace the wiring.

  1. Dirty Air Filters:

Clogged air filters can impede airflow and reduce efficiency. Regularly clean or replace filters to ensure optimal performance.

  1. Low Refrigerant Levels:

Low refrigerant levels can impact cooling capacity. A refrigerant recharge by a certified technician is necessary to address this issue.

  1. Thermostat Malfunction:

Check the thermostat settings and replace batteries if needed. If problems persist, consider professional assistance to repair or replace the thermostat.

  1. Blocked Condenser Unit:

Remove any debris or vegetation obstructing the condenser unit. Ensure proper airflow for efficient heat exchange.

  1. Sensor Issues:

Malfunctioning sensors can lead to inaccurate temperature readings. Clean or recalibrate sensors according to the manufacturer’s guidelines.

  1. Faulty Capacitors or Relays:

Inspect and replace any faulty capacitors or relays to ensure the smooth operation of the air conditioner.

  1. Compressor Problems:

Compressor issues can hinder the cooling process. Consult a technician to diagnose and address compressor-related problems.

  1. Inadequate Maintenance:

Regular maintenance is crucial. Schedule professional servicing to clean coils, check refrigerant levels, and address potential issues.

Electronic Control Board Failure:

If the electronic control board is malfunctioning, it can disrupt the air conditioner’s operation. Seek professional assistance for repair or replacement.

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Preventive Measures for Future Issues

  1. Regular Maintenance:

Schedule routine maintenance checks by a certified technician to keep your air conditioner in optimal condition.

  1. Clean Air Filters:

Clean or replace air filters regularly, preferably every 1-2 months, to maintain efficient airflow.

  1. Clear Surroundings:

Ensure the area around the outdoor unit is free from debris, plants, or any obstructions.

  1. Proper Ventilation:

Maintain proper ventilation in the room to prevent strain on the air conditioner.

  1. Temperature Settings:

Avoid extreme temperature settings that could overwork the system. Optimal settings balance comfort and energy efficiency.


Following these steps, you can reset your Mitsubishi air conditioner and troubleshoot common issues. Regular maintenance and preventive measures are key to ensuring your air conditioner functions seamlessly, providing a cool and comfortable environment during Australia’s warm seasons. If problems persist, consult a professional technician here at DGB Refrigeration Heating & Cooling to diagnose and resolve the problem accurately. Regular maintenance and prompt attention to error codes will contribute to the longevity and reliability of your Daikin air conditioner.

So don’t hesitate to get in touch with us. Our experienced technicians at DGB Refrigeration Heating & Cooling are always at your service. Dial 03 7038 6918 and stay cool all summer long!


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