Potential Fixes For A Window Air Conditioner Leaking Inside Your Home


A window air conditioner offers convenient cooling without the need for a central system. Window units are relatively low maintenance and require few repairs due to the smaller number of working parts than a central unit. But a window unit's potential for leaking water inside your home can cut down on some of the cooling charm.

If your window unit has started leaking inside your home, there are a few potential problems and fixes. Note that water is supposed to leak outside your home as a drainage method. Call a heating and cooling services technician if you have any more questions or need professional repair assistance.

Improper Installation

Improper installation is a common cause of water leaking out of your window unit and onto your floor. Window units are designed to sit in the window sill balanced by expandable wings on each side. The unit has to be tilted slightly to allow condensation, which is a natural byproduct of the cooling process, a way to drain out of the unit.

Check your user's manual to make sure your unit was installed with the recommended level of tilt. If the unit isn't tilted out far enough, try to install the unit again to better match the manufacturer's instructions. Or call in an HVAC installation company to perform the installation.

Clogged Condensate Drain

The condensate in a window air conditioner arises from the evaporator coils becoming cold as they transform refrigerant from liquid to gas. The cold coils make it possible for you to have cold air but they also drip off some condensate in the process.

In the bottom of your window air conditioner, there is a drain pan that catches the condensate. The drain pan has some way to move that condensate on out of the unit so you don't end up with a flood. The disposal route might be a hole or other small opening on the bottom of your unit.

Check the hole or opening for any dirt or mineralization buildups that could have clogged the path and caused water levels to rise inside your unit. Clean the hole or opening with a bottle cleaner or pipe cleaner soaked in a cleansing fluid.  

Faulty Evaporator Coils 

If your drain pan opening isn't clogged and the air conditioner has the proper tilt, you might have evaporator coils that are getting a bit too cold and putting off more condensate than normal. What cause evaporator coils to become overly cold?

The coils can become dirty due to dirt and other particles in the air. You can clean the coils by taking apart your unit and using a no-rinse foaming coil cleanser – or by calling in an HVAC tech to perform the job for you. The tech might be required anyway, since another cause of coil problems is an inadequate level of refrigerant, which is a chemical that only a professional can replace. To find out more, speak with someone like Pompeii's Custom Plumbing.


16 December 2015

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