Visual InspectionExternal Leakage Signs: Examine the exterior of the cooling coil and its connections. Look for any signs of water droplets, moisture, or water stains on the coil surface, pipes, or fittings. If there is refrigerant in the coil, you might also notice oil stains, as refrigerant often

A water cooling coil for an Air Handling Unit (AHU) is a component used in HVAC (Heating, Ventilation, and Air Conditioning) systems to transfer heat from the air passing through the coil to the water circulating within it. This process helps to cool the air before it is distributed into a building