Why Is My AC Leaking Water? Causes & Fixes in Phoenix, AZ
Is your AC leaking water? In Arizona’s hot, dry climate, your air conditioner works overtime to keep your home cool. Part of that process naturally creates condensation, but if that moisture ends up inside your home instead of draining outside, you have an AC leak. Left unchecked, leaks can lead to water damage, mold growth, and costly repairs.
During summer heat waves in Mesa, Phoenix, and the East Valley, your AC often runs for hours without a break. This constant operation can make small problems, such as a clogged drain line or slightly frozen coil, develop into major leaks faster than many homeowners expect. Acting quickly is the best way to protect your home and your comfort.
Common Reasons Your AC Is Leaking Water
Several common issues can cause your AC to leak. Identifying the source is the first step to a lasting repair or figuring out if you need a full AC replacement.
Clogged Condensate Drain Line
The condensate drain line carries water away from your system. In Arizona, dust and debris can mix with condensation and form clogs. Symptoms include water pooling around your indoor unit, musty odors, or mold near the drain line. Clearing the line can restore proper drainage, but if ignored, the backup can overflow into ceilings, walls, and flooring. If your ac is leaking water, contact our team today for fast-reliable solutions.
Frozen Evaporator Coils
When the evaporator coils freeze, they eventually thaw and release excess water, sometimes faster than the drain system can handle. Causes include restricted airflow, dirty filters, or low refrigerant. Continued operation with frozen coils can damage your compressor, and in our climate, the thaw can create more water than expected, leading to sudden puddles indoors.
Damaged or Rusted Drain Pan
Older systems or those exposed to moisture for long periods may have a rusted or cracked drain pan. This causes water to escape before it reaches the drain line. It is common in units over 10 years old or systems in high-humidity spaces, and over time, the damage can spread, requiring pan replacement or a new air handler.
Low Refrigerant Causing Coil Freeze
Low refrigerant can cause the temperature of your coils to drop too much, leading to ice formation and melting leaks. Signs include hissing sounds, reduced cooling power, and higher energy bills. Left untreated, this can cause severe system strain and shorten your AC’s lifespan.
Improper Installation or Leveling Issues
If your AC is not level, water may pool inside instead of draining correctly. This is often seen after recent installations or relocations. Over time, pooling water can cause corrosion inside the unit and encourage algae growth in the drain pan.
Is It Safe to Run an AC That’s Leaking Water?
Running a leaking AC can cause water damage to floors, walls, ceilings, mold and mildew growth inside your home, and electrical hazards if water reaches wiring or controls. Even though Arizona is dry, moisture from an AC leak can still collect in ductwork, insulation, or wall cavities, creating hidden mold risks. If you see water pooling around your system or notice a steady drip, it is best to turn it off and call for service. Continued use can make the problem worse and increase repair costs.
DIY Fixes You Can Try First
Before you call for professional AC leaking repair, you can check a few simple things. Always turn off the power to your system before inspecting. Check and replace your air filter, as dirty filters restrict airflow and can cause coils to freeze. Inspect the condensate drain line and use a wet/dry vacuum at the exterior drain line to remove clogs.
Look for ice on the coils; if frozen, turn off the AC and run the fan to help thaw them before restarting. Make sure the unit is level using a carpenter’s level and adjust slightly if it is tilted. You can also check for algae buildup in the drain line and flush it with a vinegar solution to help prevent blockages. These steps can sometimes resolve minor issues, but if the leak continues, you will need professional help. Make sure to also check out our AC troubleshooting guide.
When to Call Wolfgang’s Cooling, Heating, & Plumbing
Some AC leaks are more than a quick fix. Call Wolfgang’s if you notice persistent leaks even after clearing the drain line, electrical issues or tripped breakers near the unit, signs of refrigerant loss such as warm air, hissing, frozen coils, or water damage or mold around your air handler. We offer prompt AC repair in Mesa, Phoenix, and across the East Valley. Our technicians arrive with the tools and parts to diagnose and repair leaks quickly, helping you avoid extended downtime during Arizona’s hottest months. We also provide same-day service availability during peak summer season so you can restore comfort before your home heats up.
For ongoing reliability, consider scheduling AC maintenance each spring. Our comprehensive tune-ups catch issues like clogged drain lines before they cause leaks, giving you peace of mind heading into triple-digit weather.
Don’t Wait to Fix an AC Leak
Arizona summers push your cooling system to its limits. A small leak can quickly turn into a major repair if ignored. Whether you need urgent AC repair, routine maintenance, or even emergency service, Wolfgang’s is here to help. When your AC is leaking water, call Wolfgang’s Cooling, Heating, & Plumbing today for fast AC repair in Mesa, Scottsdale, Phoenix, and the East Valley. We will restore your comfort and protect your home from further damage.
