Clogged Condensate Drain Line

A clogged condensate drain line is the most common cause of an AC unit leaking water. In the drain line, dirt, dust, and debris can accumulate over time, preventing the water from draining properly. When this happens, the water can back up and overflow, leading to leaks. If you suspect your drain line is clogged, contact our HVAC professional to have it cleared.

Dirty Air Filters

Dirty air filters can also cause your AC unit to leak water. Air filters are designed to catch dirt and debris from the air, but when they become clogged, they can reduce airflow, causing the evaporator coil to freeze up. When the coil thaws, the excess water can overflow and leak from the unit. Regularly changing your air filters can prevent this issue from occurring.

Broken Condensate Pump

In some air conditioning systems, a condensate pump moves water from the evaporator coil to the drainage system. If the pump is broken or malfunctioning, it can cause water to accumulate and leak from the unit.

Oversized Unit

If your AC unit is too large for the space it’s meant to cool, it may cycle on and off frequently, leading to excess moisture buildup on the evaporator coil. This can cause the coil to freeze and thaw, leading to water overflow and leakage. Installing an appropriately sized AC unit for your home can help prevent this issue.

Low Refrigerant Levels

Low refrigerant levels can cause your AC unit to freeze up and leak water. The refrigerant is responsible for absorbing heat from the air, and when it’s low, the evaporator coil can become too cold and freeze up. When the coil thaws, the excess water can overflow and leak from the unit. If you suspect that your refrigerant levels are low, it’s essential to contact an HVAC professional to have them checked and refilled if necessary.

Damaged Or Blocked Drain Pan

The drain pan is located under the evaporator coil and is designed to catch any excess water that drips from the coil. If the drain pan becomes damaged or blocked, it can cause the water to overflow and leak from the unit. Our professional AC technician can inspect and replace the drain pan if necessary.

Improper Installation

If your AC unit was improperly installed, it could cause water leaks. If the unit is not level, it can cause the water to drain improperly, leading to leaks. Our professional air conditioning technician can inspect the installation and make necessary adjustments to prevent leaks.