Air Conditioner Leaks: Common Causes and How to Fix Them

Your air conditioner keeps you and your family cool during hot weather by removing heat and humidity from the air and pumping them outside your home. The byproduct of this process results in generating water in the air handler. When a component malfunctions or sludge builds up, it can block the piping and cause the water to accumulate in the drain pan. This can make your air conditioning system leak. 

To make necessary AC repairs, you should determine first the reason why it malfunctions. Here are some common reasons why air conditioners leak:

Clogged Air Filter

Your air conditioner’s filter requires proper ventilation. This allows the unit to work optimally and maintain the desired temperature. This also ensures the evaporator coils don’t freeze, thaw, and produce excess water that can possibly overflow. To produce enough airflow, it needs to be changed regularly.

Low Refrigerant Level

Refrigerants are important for air conditioners since they are responsible for generating cold air. If your system isn’t cooling enough and you discover a leak, the refrigerant level may not be sufficient. Without enough refrigerant, the drain pain might overflow due to frozen evaporator coils. Thankfully, addressing this issue is easy with help from HVAC experts who can regularly check the working condition of your unit. 

Blocked Condensate Drain 

Air conditioners usually work by letting the water drain into a pan underneath the indoor coil. The condensate can then flow freely into the drain piping before the pan gets full. Unfortunately, the condensate drain could get clogged due to dirt, mold, mineral deposits, and other debris. This can cause water accumulation and leaks. 

Thanks to the help of service experts, your air conditioner will be restored to its good working condition. These professionals can also prevent further complications and minimize potential water damage by adding a safety device to your unit that will quickly switch it off if the drain gets clogged again. 

Cold Outdoor Temperature

Air conditioners provide relief from the warm weather, which means they are best used during hot days. If you use your unit when the outdoor temperatures drop to 60 degrees Fahrenheit or lower, the evaporator coils can freeze and lead water and ice to overflow. Since this is a complex issue, you need proper replacements performed by the right experts. To fix this issue, reach out to your local technicians.

Damaged Drip Pan

Air conditioners can last up to 15-20 years. While it is durable and long-lasting, your unit’s drip pan can get damaged over time and allow condensate to seep directly through it. As a result, a water leak may appear if it has holes in it. Contact HVAC experts to have your drip pan repaired or replaced and get your unit back to its proper working condition.

Disconnected Drain Line

Another possible cause of an AC water leak is a loose or disconnected drain line. This issue may occur when changing out the filter and the drain line breaks free from the pan. To resolve this issue right away, call your local HVAC technicians.


Fixing leaky air conditioners requires the right skill set and experience. To get the proper care for your unit and prevent potential leaks, seek air conditioning services. Make sure to choose a reputable service provider and consider booking a regular maintenance service to avoid future problems.

Maintaining your preferred indoor temperature is key to enjoying a comfortable home. If you need same-day air conditioner repair, contact Good Guys Home Services for an appointment. Our highly trained technicians are experienced in servicing and maintaining all air conditioning brands.


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