How to Repair Mitsubishi AC Remote: A Comprehensive DIY Guide

Repairing a Mitsubishi AC remote can be a straightforward process, but it requires a methodical approach and a good understanding of the underlying technology. Whether your remote is not responding, displaying error codes, or experiencing other issues, this comprehensive guide will walk you through the necessary steps to get your Mitsubishi AC remote back in working order.

Checking and Replacing Batteries

The first step in troubleshooting a Mitsubishi AC remote is to check the batteries. Ensure that the batteries are properly installed and have sufficient charge. If the batteries are low, replace them with fresh, high-quality batteries. It’s recommended to use alkaline batteries, as they tend to have a longer lifespan compared to other battery types.

To replace the batteries, follow these steps:

  1. Locate the battery compartment on the back of the remote.
  2. Gently remove the battery cover.
  3. Remove the old batteries and dispose of them properly.
  4. Insert the new batteries, ensuring that the positive and negative terminals are aligned correctly.
  5. Replace the battery cover and ensure it is securely in place.

Resetting the Remote and AC Unit

how to repair Mitsubishi ac remoteImage source: Mitsubishi ac By Dinkun Chen

If the remote still doesn’t work after replacing the batteries, you may need to reset it or the AC unit itself. To reset the remote:

  1. Locate the power button on the remote.
  2. Press and hold the power button for 3-5 seconds until the button light blinks twice and turns off.
  3. Release the power button, and the remote should be reset.

If resetting the remote doesn’t work, you can try resetting the AC unit:

  1. Locate the circuit breaker or switch that controls the AC unit.
  2. Turn off the circuit breaker or switch and wait for 30 seconds.
  3. Turn the circuit breaker or switch back on to reset the AC unit.

Troubleshooting Screen and Control Board Issues

If the remote is still not functioning correctly, the issue may be with the screen or the control board. In this case, you may need to contact the manufacturer for a replacement controller.

Before contacting the manufacturer, you can try the following:

  1. Remove the batteries and reinsert them, ensuring they are properly aligned.
  2. Bring the remote closer to the AC unit, as it should be within 10 meters (33 feet) to work properly.

Interpreting Error Codes

If your Mitsubishi AC remote is displaying an error code, it’s essential to understand the meaning of the code to diagnose and address the issue. Refer to the manufacturer’s documentation or the error code list provided in the initial answer to determine the specific problem and the appropriate troubleshooting steps.

Some common error codes and their meanings include:

Error Code Meaning
0403 Serial communication error
1301 Low pressure fault

Using a Universal Remote

If you are unable to repair the Mitsubishi AC remote, you can consider purchasing a universal remote as a replacement. Universal remotes are typically available for $5-$10 and can be a cost-effective solution.

To use a universal remote, follow these steps:

  1. Locate the model number of your Mitsubishi AC unit, usually found on the side of the unit.
  2. Purchase a compatible universal remote from a reputable online retailer, such as eBay or Amazon.
  3. Follow the instructions provided with the universal remote to program it to work with your Mitsubishi AC unit.


Repairing a Mitsubishi AC remote can be a straightforward process, but it requires a methodical approach and a good understanding of the underlying technology. By following the steps outlined in this comprehensive guide, you can troubleshoot and resolve a wide range of issues with your Mitsubishi AC remote, from battery replacement to control board and screen problems.

Remember to always refer to the manufacturer’s documentation and safety guidelines when working with electrical equipment, and consider seeking professional assistance if you are unsure or uncomfortable with any of the repair steps.


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