AC Leaking Water

This is a common issue that Floridians have to deal with and a question we’ve seen on countless occasions. The first step that most people take towards solving the problem is to resort to the internet for advice and to see “what to do” and how to fix it.

Majority of HVAC owners believe that an air conditioner leaking water is unavoidable when in fact, preventing your A/C unit from having a leak is easier than you’d think.

Read on to see the 4 most common causes of your air conditioner leaking water.

  • Your Condensate Drain Line is Clogged

    The most common cause of AC leaks is when your condensate drain line, which is responsible for disposing condensate from the overflow pan into a drain pipe outdoors, gets clogged.

  • If the piping gets clogged with insects, dust, dirt, or mold, for example, the liquid will have nowhere to go and will be released back into the home. The best way to avoid this issue is to schedule regular HVAC Maintenance checks in order to have a professional make sure everything’s running smoothly and efficiently.

    What to do:

    A tip for avoiding a clogged drain line is to pour about 6 ounces of vinegar down the drain line every couple of months to avoid the possibility of any buildup. Again, if it’s too late, the best route is to contact a professional.

cleaning condensate drain line air conditioning leak

Photo Credit : Today’s Homeowner

  • Damaged Overflow Pan

    The overflow pan’s main job is to deliver the condensate into the condensate drain line to be disposed outdoors, but when the pan is ruined or ineffective, you need to replace it. You can simply check the condition of the overflow pan with a flashlight to see if you can notice any cracks or holes that the liquid is escaping through.

  • If the holes or cracks can’t simply be patched up with waterproof sealant, you’ll need to replace it.
  • Dirty Air Filter

    A simple cause that consistently goes overlooked is making sure your air filter is up to the standards it needs to be in order to operate efficiently. When the air filter becomes dirty, it blocks airflow over the evaporator coil which translates to the coil becoming too cold and freezing.

  • This leads to the frozen liquid dripping into the overflow plan that will most likely lead to a noticeable leak. For starters, you want to make sure you change your air filter at least once every 3 months maximum. Click here to learn more about the importance of changing your air filter.

dirty air filter leads to air conditioner leaking water

  • Low Refrigerant

    Similar to the dirty air filter, a common cause of an air conditioner leaking water stems from low refrigerant that’ll lead to, again, frozen evaporator coils. When the coil melts, the liquid will drip down into the overflow pan and cause a leak. If you notice any strange noises coming from your A/C Unit, you most likely are dealing with a refrigerant leak.

  • DO NOT try to handle this problem without professional assistance. If a refrigerant leak is in fact the problem, you need an HVAC technician to properly diagnose the severity of the damage and determine the best course of action in terms of repairs or maintenance.


    low Refrigerant leads to air conditioner leaking water


These are only a few of the many issues that can cause your air conditioner to leak water. Water leaks can create severe and costly damage that needs to be attended to immediately. If you’ve changed the air filter, checked for a damaged overflow pan, or poured vinegar down the drain line and you’re still dealing with a leak, you need to contact Direct AC as soon as possible.

We have years of experience servicing South Florida, Miami and West Palm Beach residents with expedited care and unsurpassable results. Give us a call today if you’re in need of any HVAC Services whatsoever.