Air Conditioning

Causes of Central Air Conditioners Leaking Water: What You Need To Know

Causes of Central Air Conditioners Leaking Water

An operational AC unit is a must in the home during the hot summer. It provides cooled air within the living space and helps to dehumidify the environment. Unfortunately, there are times when things go wrong with the AC unit, and it starts to leak water.
Leakage is a common problem that occurs with air conditioners. Several possible causes of the question “why is water coming out of the central air conditioner?” include clogged drains, refrigerant leaks, and a faulty seal. The initial step is to determine the source of the leak.

Causes of AC Leaking Water from Central Cooling Unit

Clogged Drain Line:

A clogged drain is the most common cause of ac unit leaking from an AC. The AC unit starts throwing water inside when the Drain Line becomes blocked, which can cause extensive damage to your home. You can do several things to prevent a clogged drain and water leakage from your central cooling unit.
Be sure to clean the debris from the drain regularly and use a screen to keep objects from falling into the gutter. If the drain becomes clogged, you can use a plunger or a snake to clear it. If you still experience water leakage, you must call a professional to repair the damage.

Causes of Central Air Conditioners Leaking Water

Cracked Drain:

A cracked drain pan is also one of the most common causes of leaking water from the central air conditioner unit. The drain pan is a metal or plastic container that sits below the evaporator coil and catches the water that drips from the coil. If the drain pan cracks, the water will leak out and cause damage to the floor, ceiling, or walls. 

To prevent a cracked drain pan from causing water damage, it is essential to regularly check the condition of the pan and replace it if it is broken or damaged. You can also install a drip pan liner to help protect the pan from cracking.

Evaporator Coil:

The evaporator coil is a component of the air conditioning system responsible for absorbing and releasing heat from the refrigerant into the air inside your home. If this component freezes, it can cause water to leak from the cooling unit. Several things can cause your evaporator coil to freeze.
One of the most common causes is a lack of airflow due to dirty air filters or a clogged evaporator coil. Another common cause is low refrigerant levels. If your refrigerant levels are too low, the coil will not be able to absorb enough heat and will freeze. Be sure to get it checked by professionals.

Also, Read: Should I Drain My Toshiba Portable Air Conditioner?

Causes of Central Air Conditioners Leaking Water

Condensate Pump Not Operating:

One common issue people experience in summers is a condensate pump that isn’t working, leading to water leaking from the AC. If you are having this issue, it is essential to call a professional to come and take a look at it. They will be able to determine what is wrong and fix it quickly and efficiently.

Low Refrigerant Level:

If you are experiencing water leaking from your AC, the cause may be a low refrigerant level. When the refrigerant level is low, it can cause the compressor to overheat, which will then cause the water to leak out of the system. It is essential to have your AC system regularly serviced to prevent this from happening. A licensed technician will check the refrigerant level and make any necessary repairs.

Causes of Central Air Conditioners Leaking Water

Dirty Air Filters:

Dirty air filters are often the cause of water leaking from a central cooling unit. The dirty air filter causes the air to be hotter, and this extra heat causes the AC unit to work harder. This additional work makes the AC unit produce more condensation, which leaks out of the cooling unit.

Causes of Central Air Conditioners Leaking Water

If no water comes out of the drain pipe, it is also a concern. Read about the causes and solutions here.


If you experience that your aircon is leaking water inside, it is essential to have it fixed as soon as possible. It could cost you a lot of money if the issue you don’t address the problem promptly. If you’re having any of these issues, call a professional technician, like the ones at K2 Heating & Air Conditioning. We can help you find and fix the source of the leak and get your AC unit back up and running in no time.

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