Air Conditioning Systems

I see this fault constantly on wall-mounted split systems, especially in hot and humid climates.

The indoor unit is cooling, but after a while water starts dripping from the front of the aircon, running down the wall, or leaking from one side of the unit.

What are the most common causes?

1. Blocked condensate drain

This is probably the first thing to check.

As the evaporator cools the room air, moisture condenses on the coil and runs into the drain tray.

Poor airflow leads to hot and cold spots, energy waste, and system strain. Learn how to test and balance airflows for better comfort and efficiency.

Even the best-designed system can perform poorly if airflows aren’t balanced.

Use a digital anemometer to measure CFM at each diffuser and adjust balancing dampers until supply matches design airflow.

In VAV systems, check actuator calibration and minimum air settings.

Balanced airflow improves comfort, reduces energy consumption, and helps compressors and fans run at optimal load.

Always check filter condition and coil cleanliness before airflow testing to ensure accurate readings.