Although AC units are expected to “leak” some water (outside) as part of their normal operation, if you do find a window A/C unit leaking water inside your home, try troubleshooting a water leak in a TCL window air conditioner using these steps to potentially identify potentially and resolve the issue. Here’s a guide to help you through the process:

Common Causes of Water Leaks

• Improper installation tilt
• Dirty air filter
• Dirty or frozen evaporator coils
• Obstructed airflow
• Cracked or damaged drain pan

1. Safety Precautions

• Unplug the Unit: Always disconnect the air conditioner from the power source before inspecting or working on it.
• Clean Up Water: If there's water around the unit, clean it up to avoid slipping or electrical hazards.

2. Check Installation

• Tilt Angle: Ensure the air conditioner is installed with a slight tilt backward (towards the outside). This helps proper drainage of the condensed water.

3. Inspect the Drainage System

• Drain Holes: Ensure that the drain holes at the bottom of the unit are not blocked. Use a small brush or a piece of wire to clear any obstructions. (Note, only a handful of models have this capability).
• Drain Pan: Check the drain pan for cracks or damage. If it’s damaged, it might need replacement.

4. Check the Filter

• Clean or Replace Filter: A dirty air filter can restrict airflow, causing the evaporator coils to freeze and subsequently leak water when they thaw. Clean or replace the filter regularly.

5. Inspect the Evaporator Coils

• Clean Coils: Dirty coils can also cause ice formation. Clean the coils with a soft brush or a vacuum cleaner to ensure proper operation.
• Check for Ice: If you notice ice build-up, turn off the unit and let it thaw completely before restarting.

6. Check for Airflow Obstructions

• Obstructions: Ensure that there are no obstructions blocking the airflow around the air conditioner, both inside and outside.

7. Inspect the Condenser Coils

• Clean Coils: Ensure the condenser coils are clean and free from debris. Use a coil cleaner or a soft brush to clean them.

8. Check for Proper Refrigerant Levels

• Refrigerant Leak: Low refrigerant levels can cause the evaporator coils to freeze. If you suspect a refrigerant issue, contact a professional technician for service.

9. Ensure Adequate Room Ventilation

• Ventilation: Make sure the room where the air conditioner is installed has proper ventilation to help maintain optimal performance and prevent excessive humidity.

By following these steps, you should be able to identify and potentially fix the cause of the water leak in your TCL window air conditioner.