If you have noticed an AC leaking water inside your home, you may be concerned about the issue and wondering why it is happening. Water leaks from your air conditioner are not uncommon, but they should not be ignored.
Not only can it lead to water damage, but it could also be a sign of a larger problem with your AC unit. Read this blog post to explore the reasons your AC might be leaking, the possible causes, and how to fix it before it causes further damage.
Why Is My AC Leaking Water?
One of the most common reasons is related to the condensation process that occurs during cooling. As warm air passes over the evaporator coils, moisture in the air condenses and turns into water.
This water typically drains through a pipe or hose into a drain pan. However, if there is an issue with the drainage system, such as a clog or malfunction, an AC unit leaking water inside your home can occur.
Below are some of the most common reasons why water is leaking from your AC unit and how to fix it yourself if possible. Read on to discover!
1. Clogged Drain Line
One of the most common causes of an AC leak is a clogged drain line. The condensation that builds up during cooling has to exit the AC unit through a drain line. Over time, the drain line can become clogged with dirt, algae, and other debris.
When the line is blocked, water can back up and leak from the AC unit. It is often one of the first things to check when you notice water leaking from your AC indoor unit.
2. Dirty Air Filter
A dirty or clogged air filter can obstruct airflow and cause the evaporator coils to freeze. As the ice melts, it can result in excessive water, which may leak from the unit. This problem can also lead to other issues, such as your AC not cooling and increased energy consumption. Check the air filter if you see water on or around your unit.
3. Frozen Evaporator Coils
Suppose the evaporator coils inside your AC unit freeze, the water that would normally condense may accumulate and leak out when the ice melts. It could be caused by poor airflow (due to a dirty air filter or a malfunctioning fan) or low refrigerant levels.
4. Damaged Drain Pan
The drain pan is the part of your AC that catches excess water. Over time, it can become rusted or damaged, resulting in water leaking from your unit. A cracked or damaged drain pan will not be able to hold water properly, causing leaks, and it may need to be replaced.
5. Improper Installation
Sometimes, water leaking from wall AC units can result from improper installation. If your AC unit is installed incorrectly, such as being tilted at the wrong angle, the water may not be able to drain correctly. It can cause water to leak out of the unit and it might be why your window AC is leaking water. A professional technician will need to adjust the installation to ensure proper drainage.
How To Fix AC When The AC Is Leaking Water?
Check the drain, clean the filter, and if you live in places with harsh winters, thaw the coils if necessary. Dirty coils can also be the reason your AC is running constantly. Here, we go into more detail on how to fix these problems yourself.
1. Check The Drain Line
Start by checking the drain line for any clogs or obstructions. Use a wet/dry vacuum to suck out any debris or dirt that may be blocking the line. If the clog is deeper in the pipe, you may need to use a long brush or call a professional to clear the blockage.
2. Replace Or Clean The Air Filter
If your air filter is dirty or clogged, replace it with a new one or clean it (if it is reusable). A clean filter will help ensure proper airflow, preventing frozen coils and condensation buildup. Regularly changing or cleaning the air filter will also help improve the overall efficiency of your AC.
3. Thaw Frozen Coils
If your evaporator coils have frozen, turn off the AC and let the ice thaw completely. Once thawed, check for underlying issues, such as low refrigerant levels, which may require professional attention. Be sure to replace the air filter to prevent the problem from recurring.
4. Inspect The Drain Pan
Check the drain pan for any signs of cracks or damage. If the pan is rusted or broken, it must be replaced. A damaged pan will be unable to hold the water draining from the evaporator coils, causing leakage.
If you have tried the above steps and your AC is still leaking water despite your efforts, it is time to call an HVAC professional. A licensed technician can assess the situation and identify any underlying problems, such as refrigerant leaks or mechanical failures.
