These hot summer months likely have your central AC system working overtime to keep your home cool and comfortable. So discovering water pooling around your AC unit (or dripping from your ceiling) can be quite alarming. While water leaks from your AC can cause significant damage if left unaddressed, it’s not always a cause for panic. Several factors could be causing this issue and understanding them can help you address the problem effectively.

Here are 5 common reasons why your AC unit may be leaking water.

1. Clogged Condensate Drain Line

The most common cause of water leakage in AC units is a clogged condensate drain line. This drain line carries away the condensation produced by your AC. Over time, it can become clogged with dirt, algae, or mold. When this happens, the water backs up and spills over, leading to leaks.

Solution: If you feel comfortable taking the DIY route, use a wet/dry vacuum to clear the clog. Otherwise, contact a professional to clean the line thoroughly.

2. Dirty Air Filter

A dirty air filter can restrict airflow, causing the evaporator coils to freeze. When the ice melts, excess water may overwhelm the drain pan, resulting in leaks.

Solution: Change your air filter every 1-3 months, depending on your usage and the manufacturer’s recommendations.

3. Damaged or Rusty Drain Pan

An older air conditioning unit may have a damaged or rusty drain pan. If the pan is cracked or corroded, it won’t be able to hold water properly, leading to leaks.

Solution: Inspect the drain pan for any signs of damage. If you find cracks or rust, replace the drain pan.

4. Low Refrigerant Levels

Low refrigerant levels can cause the evaporator coils to freeze, similar to the issue with dirty air filters. When the ice melts, it can cause excessive water buildup, leading to leaks.

Solution: Low refrigerant levels indicate a possible leak in the system. You’ll need a professional HVAC technician to locate and repair the leak, and to recharge the refrigerant to the proper level.

5. Improper Installation

Improper installation of your AC unit can lead to several issues, including water leaks. If the unit isn’t level, water may not drain correctly from the condensate pan.

Solution: Check if your AC unit is level. If it’s not, you may need to adjust the positioning or contact an HVAC professional to correct the installation.

Preventative Measures

To prevent future leaks, schedule regular maintenance for your air conditioning system. Professional inspections can catch potential problems early, ensuring your AC unit operates efficiently and without leaks. If it’s been a year or more since your AC system was professionally inspected, contact C&D Cooling & Heating today to keep your AC unit running smoothly and your home comfortable and dry.