If you’ve spotted a puddle near your air conditioner or noticed water dripping from your ceiling vents, you may be dealing with an HVAC water leak. This common problem can be frustrating, especially when you’re unsure what’s causing it or how to fix it. In this blog, we’ll break down the most common reasons for water leaks from HVAC systems. Then, we’ll explain how to control the drip from your HVAC system before it leads to water damage or costly repairs.
And if you need immediate repairs, call Deljo Heating and Cooling for reliable 24/7 HVAC service.
Why Is My HVAC System Leaking Water?
Your HVAC system doesn’t just heat and cool your home—it also pulls humidity from the air. That moisture is collected and drained away through a condensate line. But when something goes wrong in the system, water can build up and leak. Here are the most frequent causes of a leaking HVAC unit:
1. Clogged Condensate Drain Line
This is one of the most common reasons for a water leak from HVAC units. Dust, mold, and debris can clog the drain line over time. When the line is blocked, water backs up into the system and spills out, often pooling around your indoor unit.
2. Dirty or Blocked Air Filter
When your air filter is dirty, it restricts airflow across the evaporator coil. That can cause the coil to freeze. When the frozen coil melts, it can lead to excess water that overwhelms the drain system, causing leaks.
3. Cracked or Rusted Drain Pan
Older systems may have drain pans that are rusted or cracked. If the pan can’t hold water, it will leak directly onto the floor or ceiling below.
4. Low Refrigerant
Low refrigerant levels can lower the pressure in your system, causing the evaporator coil to freeze. Just like with a dirty filter, the coil will thaw and possibly cause water overflow.
5. Improper Installation or Leveling
If your HVAC unit or drain pan isn’t properly installed or level, water may not flow toward the drain as intended. This can lead to slow leaks or even sudden overflows.
How to Control Drip from Your HVAC System
If you’ve noticed water dripping, don’t panic—but don’t ignore it either. Follow these steps to control the situation:
- Turn off the HVAC unit to prevent further water damage.
- Check the air filter and replace it if it’s dirty.
- Inspect the drain line to see if it’s clogged. A wet/dry vacuum may help clear the line.
- Empty the drain pan and check for cracks or rust.
- Call a professional if you’re unsure or the leak persists.
Remember, while some fixes are DIY-friendly, a persistent HVAC water leak often needs expert attention to prevent mold growth or system failure.
Preventing Future HVAC Water Leaks
Routine maintenance is key to preventing water leaks. A professional HVAC technician can inspect and clean the system, flush the drain line, and catch early signs of trouble—before they turn into bigger issues.
Get Help from the HVAC Pros at Deljo Heating and Cooling
If you’re dealing with a leaking HVAC system or aren’t sure how to control the drip from your HVAC system, don’t wait for the damage to get worse. The experts at Deljo Heating and Cooling are here to help. We’ll inspect your system, identify the issue, and get things running smoothly again. Call us today or schedule your appointment online for fast, reliable emergency HVAC service you can trust.
