Evaporator Coil Repair, Done the Right Way

Picture the coil this way. It is a grid of thin copper tubing, wrapped with aluminum fins, sitting inside the metal box your furnace or air handler lives in. Cold refrigerant runs through the copper. Warm air from your home blows across the fins. The coil pulls heat out of that air. That is the entire job. When something interferes, dust caked on the fins, a leak in the copper, ice on the surface, the system keeps running but the cooling drops off. Sometimes by a little. Sometimes the air at the vents barely feels cool at all.

Repair work depends on what is actually wrong with the coil. A dirty coil gets cleaned. A frozen coil gets thawed and the underlying cause gets fixed (usually airflow or refrigerant). A leaking coil gets sealed if the leak is small and accessible, or replaced if it is not. Refrigerant work falls under EPA rules. The U.S. Environmental Protection Agency requires licensed handling and proper recovery on every coil repair that opens the refrigerant circuit. We follow that to the letter, no shortcuts.