How to Remove Child Lock in Mitsubishi AC: A Comprehensive Guide

Mitsubishi air conditioners come equipped with a child lock feature, which is designed to prevent accidental changes to the unit’s settings, especially when children are present. However, there may be instances where you need to deactivate this feature, and this comprehensive guide will walk you through the process step-by-step.

Unlock the Remote Control

The first step in removing the child lock on your Mitsubishi AC is to unlock the remote control. This is typically done by pressing and holding the “key” button on the remote for about 5 seconds. During this process, you should see the key icon on the remote’s display start blinking, indicating that the child lock is active. Continue holding the button until the key icon stops blinking, which signifies that the child lock has been deactivated.

It’s important to note that the location and appearance of the “key” button may vary depending on the specific model of your Mitsubishi AC. Refer to your user manual or the manufacturer’s website for detailed instructions on how to identify and use this button.

Turn Off the Light

how to remove child lock in Mitsubishi acImage source: Mitsubishi ac By Dinkun Chen

In some Mitsubishi AC models, the child lock can also be released by turning off the light on the unit. This is typically done by pressing and holding the “SET” button on the remote control for 3 seconds or longer. Again, the exact process may vary depending on your model, so be sure to consult your user manual for the specific instructions.

Disconnect and Reconnect the Power

If the above steps do not work, you can try disconnecting and reconnecting the power to your Mitsubishi AC. This process can sometimes reset the child lock function and allow you to regain full access to the unit’s settings.

To do this, follow these steps:

  1. Locate the power source for your Mitsubishi AC, which may be a wall outlet or a circuit breaker.
  2. Disconnect the power by unplugging the unit or turning off the circuit breaker.
  3. Wait for approximately 1 minute to allow the unit to fully power down.
  4. Reconnect the power by plugging in the unit or turning the circuit breaker back on.

After completing this process, try accessing the unit’s settings again to see if the child lock has been successfully removed.

Troubleshooting Tips

If you’re still having trouble removing the child lock on your Mitsubishi AC, here are some additional troubleshooting tips to consider:

  1. Check the User Manual: Refer to your Mitsubishi AC’s user manual for detailed instructions on how to deactivate the child lock feature. The manual may provide specific steps or button combinations that are unique to your model.

  2. Contact Mitsubishi Support: If you’re unable to resolve the issue using the steps outlined in this guide, consider contacting Mitsubishi’s customer support team. They can provide additional guidance or troubleshooting assistance specific to your AC unit.

  3. Seek Professional Assistance: In some cases, the child lock feature may be more complex to remove, or there may be an underlying issue with the AC unit. If you’re not comfortable attempting the removal process yourself, consider hiring a professional HVAC technician to assist you.

Remember, the child lock feature is designed to enhance the safety and security of your Mitsubishi AC, so it’s important to follow the proper procedures when deactivating it. By following the steps outlined in this comprehensive guide, you should be able to successfully remove the child lock and regain full control over your air conditioning unit.


  1. Mitsubishi Electric RKW012A412D User Manual
  2. How to Unlock Mitsubishi Air Conditioner Remote Control
  3. Mitsubishi Air Conditioner Child Lock Reset
  4. Mitsubishi Electric SRK20ZM-S User Manual
  5. Mitsubishi Air Conditioner Child Lock Unlock