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Mitsubishi Troubleshooting

How to Repair Mitsubishi Aircon Leaking Water Problem

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A leaking Mitsubishi aircon is one of the most common issues affecting aircon owners and residents in Singapore, apart from the usual aircon error codes.

Since the Japan-based manufacturer ranks among the best aircon brands in the country, a lot of Singaporeans choose its units to bring cool and comfort to their homes. But when dealt with different internal and external factors, even the best aircon brands can succumb to the most common aircon problems.

Luckily for you, we’ve rounded up the best DIY ways and tips to fix these issues — starting with a Mitsubishi aircon leaking water.


Reasons for Water Leakage in Your Mitsubishi Aircon

There are a number of reasons that can cause water leakage in your aircon. But when it comes to the nature of these issues, it only always boils down to clogging or excessive condensation.

A drain line is responsible for collecting water from the aircon coil and pushing it outside of the unit through pipes. When dust or dirt starts building up in the line, it can cause clogging in the system, eventually disrupting water flow and causing leakage.

Other reasons also include dirty air filters, broken overflow pans, damaged pumps and low refrigerant levels or leaking. 


How to Repair or Fix a Leaking Mitsubishi Aircon

1. Remove the aircon from the wall or window

To solve the problem of leaking water, the first thing you need to do is take it out of the wall or window. This will stop the leaking or dripping from the unit right away.

As most aircon units are naturally heavy, it’s always a good idea to ask for assistance from other members of the house or from a technician. Make sure to move the aircon gently to avoid any slip-ups. For additional caution, refer to the manual for best handling tips.

Once you’ve successfully removed the unit, place it on a dry, clean and flat surface. Avoid placing it on wet and dirty surfaces such as soil or grass to prevent additional problems.

2. Unscrew and open the unit

Get a screwdriver and gently open the unit by removing the bolts and screws. Make sure to keep these in a secure container to prevent misplaced detachables later on. 

Because aircons vary by size, type and design, there is no standard way of unscrewing these units. For the best guidance, check your aircon manual and look at disassembling instructions.

3. Repair the leaking problem

Once it has been uncovered, you should see a plastic tray at the bottom of the unit. This tray or pan is responsible for collecting water during the cooling process. If you notice any dust, dirt or mold formations, then it’s just all the more reason for you to clean the surface right away.

To remove these particles, simply connect a hose or any water source to the tray and let a steady stream of water flow through the entire surface. You can also add a few drops of dishwashing soap or gentle detergent soap to disinfect and further break down the stains. Rinse everything thoroughly with water after 10 to 15 minutes once everything appears dirt-free.

For other causes such as refrigerant leaks or broken overflow pans, contact a professional aircon technician or servicing company. These are not recommended for DIY repairs as they usually involve more stringent repair procedures.

4. Dry the aircon unit and screw everything back together

After cleaning and draining the tray free of dirt and cloggings, it’s time to assemble everything back together. But before doing this, you need to make sure that every part and surface has all dried up of water. Once you see no more signs of water in the unit, screw it back together. Simply repeat the similar process in reverse. If you want to be extra sure, you can always read the manual for reassembling instructions.

Reinstall the aircon in the window or the wall to put it up and running once again. Make sure that everything is tight, secure and aligned correctly to avoid running into a new problem down the line.

5. Turn on the unit and observe for any continued leakages or problems

Once the unit has started running again, be on the lookout for any slightest hint of leakages or drippage. If you find that the problem has stopped altogether, congratulations! You have successfully repaired your leaking aircon.


Additionally, you would also want to pay attention to any noise such as whirring, squealing or any unusual sound that can indicate something’s wrong with the way the unit was reassembled or reinstalled.


If the problem still continues to persist or if you run into a new complication with the unit, contact an air conditioning servicing company or technician right away.


Keeping Your Mitsubishi Aircon in Perfect Shape

Mitsubishi Electric is undoubtedly one of the best aircon brands in Singapore and the world over. But just like any air conditioning unit out there, these aircons are not particularly exempted from the problem of water leaking and dripping.

To ensure that you get the best care and repair for your unit, contact us here at Luce Aircon! Our friendly aircon experts and technicians are here to fix any air conditioning issue — from an aircon water leak to broken compressors and refrigerant leaks.

Are you experiencing continuous blinking lights from your Mitsubishi aircon? Then read our guide about repairing this problem easily.

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Staff Writer

Staff Writer

This article is written by our passionate staff writers who seek to share our knowledge from our business

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