Innovative Air Van

Why Is My AC Leaking Water?

May 13, 2024

Discovering water around your air conditioner or seeing it drip from the unit can be a common issue for homeowners. However, it’s not just a nuisance-it’s a sign of an underlying problem. Understanding the causes of air conditioner water leakage is not just about diagnosing and resolving the issue promptly, but also about empowering homeowners to take proactive measures and avoid potential damage to their homes. Calling an HVAC NYC contractor to resolve the issue makes perfect sense. 

From simple AC repair to more complex issues, exploring the reasons behind leakage can help you maintain your unit’s efficiency and prolong its lifespan. In this blog, we’ll delve into the various factors that can cause your air conditioner to leak water and offer tips for troubleshooting and resolving the issue to keep your home cool and comfortable.

Should You Call An HVAC NYC Contractor?

A leaking AC unit may seem like a minor inconvenience, but if left unchecked, it can lead to significant and costly damage to your home. Water leakage from an air conditioner can damage walls, ceilings, and flooring, leading to unsightly stains, warping, and deterioration of building materials. Prolonged exposure to excess moisture can also create an ideal mold and mildew growth environment, posing health risks to you and your family. 


Additionally, water leakage can damage electronic components within the air conditioner itself, potentially leading to system malfunctions and costly repairs or replacements down the line. Addressing a leaking AC unit promptly is essential to prevent further damage and avoid expensive repair bills in the future.

While attempting DIY repairs to fix a leaking AC unit may be tempting, calling a professional HVAC company is often the safest and most effective course of action. HVAC technicians, with their extensive expertise, experience, and specialized equipment, are best equipped to accurately diagnose the cause of the leak and implement the appropriate repairs. Attempting to fix the issue yourself without this level of knowledge or training can potentially worsen the problem or cause further damage to your air conditioning system. 

Entrusting the repair process to trained professionals can ensure that the issue is addressed correctly the first time, minimizing the risk of additional damage and preserving the integrity of your home’s HVAC system.


AC water leak

Clogged or Blocked Drain Line

A clogged or blocked drain line is a common culprit behind air conditioner leaks. Over time, dirt, debris, and algae can accumulate in the drain line, restricting or completely blocking condensate flow away from the unit. When the drain line becomes clogged, water has nowhere to go and can back up into the air conditioner, resulting in water buildup and eventual leakage. 

This excess water can overflow the drain pan and spill onto the floor or seep into surrounding areas, causing water damage to your home. In addition to impeding the drainage of condensate, a clogged drain line can also create the perfect breeding ground for mold and mildew, further exacerbating the problem. To prevent water damage and maintain the efficiency of your air conditioner, it’s essential to regularly inspect and clean the drain line to ensure unobstructed drainage. 

Suppose you suspect a clogged drain line is causing your air conditioner to leak. In that case, it’s best to enlist the help of a professional HVAC technician to safely and effectively clear the blockage and restore proper drainage.

Dirty Air Filter

A dirty or clogged air filter is a common culprit behind air conditioner leaks. When the air filter becomes clogged with dirt, dust, and debris, it restricts the airflow to the evaporator coil, causing it to become excessively cold. As a result, moisture in the air condenses on the evaporator coil and freezes, forming ice buildup.

cleaning AC filter

When the air conditioner cycles off and the evaporator coil begins to thaw, the excess water drips down into the drain pan. However, if the drain pan becomes overwhelmed or if the thawing process occurs too quickly, the excess water can overflow and leak out of the unit. This water leakage can cause damage to the surrounding components of the air conditioner and lead to water damage in your home. 

To prevent air conditioner leaks caused by a dirty air filter, inspect and replace the air filter as needed regularly, typically every one to three months. Maintaining a clean air filter can ensure proper airflow to the evaporator coil and prevent ice buildup and water leakage from occurring.

frozen coil

Frozen Evaporator Coil

A frozen evaporator coil is a common issue that can lead to water leakage from your air conditioner. When the refrigerant levels in the system are low or if there is restricted airflow across the evaporator coil, it can cause the coil to become excessively cold and freeze. As a result, moisture in the air condenses on the coil’s surface and freezes into ice, forming a layer of frost or ice buildup.

When the air conditioner cycles off and the evaporator coil begins to thaw, the excess water from the melting ice can overwhelm the drain pan, causing it to overflow and leak onto the floor or surrounding areas. This water leakage can damage your home and cause further issues with your air conditioning system if not addressed promptly. To prevent a frozen evaporator coil and subsequent water leakage, it’s important to ensure that your air conditioner is properly charged with refrigerant and that there are no obstructions or restrictions to airflow across the coil. 

Regular maintenance and inspection by a professional HVAC technician are not just recommended, but crucial, to help identify and address any issues with your air conditioning system before they lead to costly water damage. By staying proactive and responsible in maintaining your unit, you can ensure its longevity and efficiency, and most importantly, protect your home from potential water leakage.

Damaged or Disconnected Drain Pan

A damaged or disconnected drain pan can significantly contribute to water leakage from your air conditioner. The drain pan serves as a reservoir to collect condensate water that drips off the evaporator coil during the cooling process. Suppose the drain pan becomes cracked, corroded, or otherwise damaged. In that case, it may no longer effectively contain the water, allowing it to leak out of the unit instead of being collected and drained away properly.

AC drain line

Similarly, suppose the drain pan becomes disconnected from the unit, develops gaps, or leaks along its edges. In that case, water can escape and pool around the base of the air conditioner, leading to water damage in your home. A damaged drain pan can also create the perfect environment for mold and mildew growth, further exacerbating the problem and potentially impacting indoor air quality. To prevent water leakage caused by a damaged or disconnected drain pan, it’s essential to inspect the pan regularly for signs of wear or damage and replace it as needed. 

Ensuring that the drain pan is installed correctly and securely attached to the unit can also help prevent leaks and minimize the risk of water damage to your home. If you suspect that your air conditioner’s drain pan is damaged or disconnected, it’s best to contact a professional HVAC technician to assess the situation and make any necessary repairs or replacements.

high humidity

High Humidity Levels

High humidity levels can exacerbate issues with water leakage from your air conditioner by causing excess condensation to form on the evaporator coil. When the air in your home contains high levels of moisture, it increases the likelihood of condensation forming on the cold surface of the evaporator coil during the cooling process.

While some condensation is expected, particularly in humid climates, excessive moisture buildup can overwhelm the drain pan and drainage system, leading to water leakage. If the air conditioner’s drain pan becomes overwhelmed by the volume of condensate, it can overflow and leak water onto the floor or surrounding areas. High humidity levels can also create a conducive environment for mold and mildew growth, further complicating the issue and potentially compromising indoor air quality. 

To mitigate the effects of high humidity on your air conditioner and prevent water leakage, it’s essential to ensure that the unit is properly sized and maintained to remove moisture from the air effectively. Installing a dehumidifier in your home can also help reduce humidity levels and minimize condensation on the evaporator coil, ultimately helping to prevent water leakage and maintain the efficiency of your air conditioning system. If you’re experiencing issues with water leakage from your air conditioner, particularly during periods of high humidity, it’s advisable to consult with a professional HVAC technician to assess the situation and recommend appropriate solutions.

Malfunctioning Condensate Pump

If your air conditioner has a condensate pump, its proper functioning is crucial in preventing water leakage issues. The condensate pump plays a vital role in removing the accumulated condensate water from the unit and pumping it out of your home through a drain line or hose. However, if the condensate pump malfunctions or fails to operate correctly, it can impede drainage, causing water to back up and leak from the air conditioner.

row of AC units

Common causes of condensate pump failure include electrical issues, mechanical failures, and clogs or obstructions in the pump or drain line. When the condensate pump fails to remove the excess water efficiently, it can lead to water buildup in the unit and potential water damage to your home’s interior. To prevent water leakage caused by a malfunctioning condensate pump, it’s essential to schedule regular maintenance checks on your air conditioning system, including inspection and testing of the condensate pump. 

If you notice any signs of pump failure, such as unusual noises, water pooling around the unit, or decreased cooling efficiency, it’s crucial to address the issue promptly by contacting a professional HVAC technician. They can diagnose the problem, perform any necessary repairs or replacements, and ensure that your condensate pump is functioning correctly to prevent future water leakage issues.

Leaking A/C? Call Innovative Air- Your HVAC NYC

If your air conditioner is leaking water, it’s essential to address the issue promptly to prevent further damage to your home and HVAC system. Calling Innovative Air for professional assistance is the best course of action to diagnose the root cause of the problem and implement effective solutions. 

Our team of skilled HVAC technicians has the expertise and experience to identify and resolve issues with leaking air conditioners quickly and efficiently. Whether it’s a clogged drain line, a malfunctioning condensate pump, or another underlying issue, we’ll work diligently to restore your air conditioner to optimal functionality and ensure your home remains cool, comfortable, and free from water damage. Don’t let a leaking air conditioner disrupt your comfort and peace of mind—contact Innovative Air today for expert assistance and reliable solutions.