Why Is My AC Leaking Water?
Water dripping from your air conditioner isn’t just annoying. It can lead to water damage, mold growth, and reduced efficiency. In Chicago’s humid summers, spotting a leak early is key to keeping your home comfortable and your AC running smoothly. In this blog, our expert HVAC technicians at Cahill Heating, Cooling, Electric, Plumbing & Sewer will cover the top reasons your AC is leaking water, walk you through DIY fixes, and help you decide when it’s time to call in the pros.
Common Causes of AC Water Leaks
Clogged Condensate Drain Line
Over time, dust and mildew can build up in the condensate drain, causing water to back up and overflow into your home.
Dirty or Clogged Air Filter
The air filter in your AC system traps dust, pollen, and other airborne particles. When it becomes too dirty or clogged, it restricts airflow, which can cause the evaporator coil to freeze. When the coil eventually thaws, excess water may overflow the drain pan. In addition to an AC leak, dirty filters can cause reduced airflow and ice buildup on your unit, so keep an eye out for these signs as well.
Frozen Evaporator Coil
The evaporator coil absorbs heat from your home’s air. If it gets too cold due to poor airflow or low refrigerant levels, it can freeze over. When the ice melts, the drainage system can become overwhelmed, leading to a leak. To tell if this is the problem you are facing, you should be able to see visible frost or ice on your AC coils.
Damaged or Rusted Drain Pan
Your air conditioner’s drain pan is responsible for collecting condensation from the evaporator coil and channeling it to the drain line. Over time, especially in older units, the pan can rust or crack, allowing water to leak out. Look for signs of rust or corrosion
Low Refrigerant Levels
Refrigerant is the substance that cools the air in your AC system. If levels are low due to a leak, the evaporator coil may get too cold and freeze. This can eventually cause excess water leakage as the coil thaws. To tell if you have a refrigerant leak, look for a visible puddle, ice on the AC coil or refrigerant lines, or listen for hissing or bubbling sounds coming from the unit.
How To Fix a Leaking AC
Fixing a leaking AC depends on identifying the root cause. Here are general steps to follow:
- Turn off the AC to prevent further damage.
- Inspect and replace the air filter if it’s dirty.
- Check the drain pan and drain line for clogs or damage.
- Let frozen coils thaw completely before restarting the system.
For more complex issues like refrigerant leaks or damaged components, professional help is required.
When To Call an HVAC Technician
While some AC leaks can be handled with basic maintenance, others require expert diagnosis. Contact our HVAC team at Cahill for AC repairs if:
- The leak persists after replacing the filter and clearing the drain line.
- You notice ice on the coils or refrigerant lines.
- There’s visible damage to the drain pan.
- Your AC struggles to cool or runs constantly.
- You suspect a refrigerant leak or faulty installation.
Schedule AC Repairs With Cahill Today
If your air conditioner is leaking or causing other problems, Cahill Heating, Cooling, Electric, Plumbing & Sewer is the HVAC company to call! We provide fast and effective air conditioning repairs, including options for same-day appointments and 24/7 emergency services. Our team has over 50 years of experience serving the greater Chicago area, so you can trust us for reliable results and top-notch customer service.
Contact Cahill today to schedule air conditioner repairs in the greater Chicago area.
