I have not tried to clean the inside coils located in the ductwork yet.
At the top of my air handler inside the house there are three lines going in, two copper and one plastic. Two are insulated and the middle one is not. It looks like there is a green corrosion stain on the middle one, and drip marks on the insulation below. Please see the pics with the links below.
The green drip marks look like they are coming from the top copper line, dripping on the middle line, and then falling on the bottom insulated line.
I will probably end up calling a technician but I wanted to understand as much of the problem as I could first. Thanks for any help.