A window AC unit is a convenient way to cool a room, but water leaks can be frustrating. When water starts dripping inside your home, it may be due to improper installation, clogged drains, or other issues. Understanding the cause can help in fixing it effectively. This guide will walk you through step-by-step fixes to stop water from leaking from your AC window unit.

Check the Tilt of the AC Unit
A common reason for water leakage is incorrect installation. Window AC units should be slightly tilted towards the outside to allow condensation to drain properly. If the unit is level or tilted inward, water can collect and drip inside. Adjust the tilt carefully, using a level if possible, so that the back of the AC is slightly lower than the front.

Clean the Drain Hole and Pan
Most window AC units have a drain hole and pan to collect condensation. Over time, dust and debris can block the drain hole, causing water to back up. Remove the unit’s front panel, locate the drain hole, and clear any debris. You can use a thin wire or a pipe cleaner to open the drain path. Empty the drain pan if water has already accumulated.

Inspect and Clean the Air Filter
A clogged air filter can cause ice to form on the evaporator coils, which later melts and leads to leaks. Remove the filter, rinse it under running water, and let it dry before reinstalling. Regular cleaning of the air filter helps maintain proper airflow and reduces the chance of leaks.

Check the Seal Around the Unit
Gaps or cracks between the window frame and AC unit can let warm air in, causing excess condensation. Inspect the seal and replace any worn or damaged weatherstripping. This will prevent leaks and improve the cooling efficiency of your AC.

Defrost Frozen Coils
If you notice ice buildup on the coils, turn off the AC and allow it to defrost completely. Once defrosted, clean the coils with a soft cloth and check for any airflow issues. Running the AC at the recommended temperature settings can prevent freezing in the future.

Regular Maintenance
Performing routine maintenance is key to preventing water leaks. Check the tilt, clean the filter, and inspect the drain hole every few weeks during heavy use. These small steps can save you from larger issues later.

By following these steps, you can manage leaks effectively and maintain your AC unit’s performance. If you are wondering how to stop water leak from AC, start with these simple adjustments and cleaning routines. Proper attention to installation and maintenance will reduce the chances of future leaks.