Abstract: An automatic self-cleaning evaporator drain pan system, having a container housing with a chemical container and a smart control pump. The smart control pump has at least one microprocessor. An evaporator drain system has at least one sensor connected to the smart control pump; and further having an electrical system. The container housing has a container tubing, and a chemical conduit with first and second chemical delivery lines. The chemical conduit extends from the smart control pump to the evaporator drain system, transporting a chemical composition. In operation, the chemical composition is mixed with condensed water and drains from the drain outlet toward a drainage line, whereby the chemical composition prevents microorganism growth, algae, gunk and/or other solid material from forming on the drain pan and the drainage line.