Troubleshooting Your Leaking AC Unit: Causes, Solutions, and When to Call a Pro

As we head into the cooler months in North Carolina, the unpredictability of fall weather can still leave us relying on our AC units. If you notice any leaks, it’s crucial to address them now to prevent bigger issues later. Let’s take a closer look at common causes of leaking AC units and how to keep your system running efficiently this season!

Common Causes of AC Leaks

1. Blocked Drain Line

   • Description: Over time, dirt, mold, and algae can build up in your AC’s drain line, causing a blockage.

   • Symptom: Water pooling around the unit or dripping from the indoor air handler.

2. Dirty Air Filters

   • Description: A dirty filter restricts airflow, causing the evaporator coil to freeze. When it thaws, it can overflow the drain pan.

   • Symptom: Reduced airflow and higher humidity levels in your space.

3. Low Refrigerant Levels

   • Description: A refrigerant leak can lead to insufficient cooling and frost buildup on coils, leading to leaks.

   • Symptom: Warm air blowing from the vents and ice accumulation on the refrigerant lines.

4. Damaged Drain Pan

   • Description: The drain pan collects water, but if it’s rusted or cracked, it may not hold water properly.

   • Symptom: Water pooling beneath the unit.

5. Improper Installation

   • Description: If the unit was not installed correctly, it may be tilted, causing water to leak instead of draining properly.

   • Symptom: Consistent water leakage from the unit.

How Can I Fix It?

Step 1: Check the Air Filter

• Action: Remove the filter and inspect it. If it’s dirty, clean it or replace it. This can improve airflow and prevent freezing.

Step 2: Clear the Drain Line

• Action: Locate the drain line, usually a PVC pipe near the indoor unit. Use a wet/dry vacuum to gently suck out any blockage. If you notice mold or algae, mix equal parts vinegar and water, and pour it down the line to clean.

Step 3: Inspect the Drain Pan

• Action: Look under the unit for the drain pan. If it’s full of water, it may be clogged or damaged. Empty it and check for cracks or damages.

Step 4: Check the Refrigerant Lines

• Action: Feel the refrigerant lines. If they are icy, this may indicate low refrigerant or airflow issues. A quick fix is to turn off the AC and let it thaw, but you should consider contacting a pro for refrigerant issues.

Step 5: Assess the Unit’s Level

• Action: Use a level tool to check if the unit is tilted. If it is, adjust the feet or base to ensure proper drainage.

When to Call a Professional

While DIY fixes can resolve many minor issues, certain signs indicate it’s time to call in an expert:

1. Persistent Leaks: If your AC continues to leak after troubleshooting, a professional can assess for further issues.

2. Low Refrigerant Levels: Handling refrigerant requires specialized skills and equipment due to safety and legal regulations.

3. Electrical Issues: If you notice unusual noises, smells, or electrical problems, it’s best to consult a technician immediately.

4. Major Repairs: If your AC is more than a decade old and showing signs of failure, having a professional evaluate your unit can determine if it’s worth repairing or time to replace.

Is It an Urgent Matter?

To determine if a leaking AC unit is an urgent issue, consider these factors:

• Amount of Water: Is the leak substantial? A large amount of water can lead to water damage and mold growth.

• Location: Is the leak near electrical components? This poses a significant safety hazard.

• Duration: Has the leak persisted for several days? Prompt action can prevent further damage.

• Weather Conditions: During extreme heat, a leaking AC can lead to a complete failure, making immediate repair essential.

A leaking AC unit can be a nuisance, but many issues can be resolved with simple troubleshooting steps using day to day items you can find in your home. Regular maintenance, like changing air filters and clearing drain lines, can help prevent leaks in the first place. 

If you find yourself facing issues with your HVAC unit or simply need seasonal maintenance to keep everything running smoothly, don’t hesitate to reach out to our team of experts at Southern Comfort Heating, Cooling, and Gas. We’re always ready to lend a helping hand to tackle any problem, ensuring your home stays comfortable year-round. 

Remember, when it comes to HVAC troubles, "If sweet tea can't fix it, we can!" Trust us to provide the reliable service you need, so you can focus on what matters most—enjoying a cool, comfortable space. Contact us today at (910)-922-4264 for all of your HVAC needs!