How to Fix an Air Conditioner Leaking Water

You depend on your air conditioner for relief on hot summer days, so when signs of a problem arise, you want to fix any issues before your air conditioner stops running completely. If your unit begins leaking water, there is a handful of possible causes. Follow these steps to troubleshoot the problem and fix it quickly, so you can get back to enjoying the cool air.


Adjust the installation angle

Inspect your air conditioner unit to determine the angle at which it is installed in the window. The rear of the unit on the outside of the window should be about an inch lower than the front. This will encourage any drips to flow outside, rather than indoors and on to the floor of your home.


Check for ice build-up

Check your unit for ice, which can form if there are problems with the cooling system. When the ice eventually melts, water can leak into your home. Ice on an air conditioner can be caused by multiple issues, so troubleshoot the cause and make necessary repairs to fix the leak in your system.


Feel for air leaks

Determine if any air is slipping in through cracks between your air conditioner unit and the window. Cooler air from inside meeting up with warm outdoor air can result in condensation, which causes dripping. If you find an air leak, patch it with foam insulation.


Find where water builds up

Run the unit for a little while to determine where the water is pooling. If it's at the front of the machine, the internal water channels might be backing up. Cleaning them manually can often solve this problem.


Clear the drain hole

Check the drainage hole located at the back of the air conditioner. If this is obstructed, water will back up into the unit and eventually leak into your home. Gently clear away dirt and debris with a small object like a pipe cleaner.


Watch the outdoor temperature

If you're reaching the end of summer or having a few cool days, the air outside may be cooler than it is indoors, especially at night. This can cause condensation and dripping to occur. Turn off the unit altogether when it's not needed, or use a setting that will switch the unit automatically to the fan when the temperature drops below a certain point.