Have just installed a piece into the drip line of my home's central A/C evaporator unit that will allow me to connect a garden hose and wash out the line downstream from the evaporator, as well as adding bleach water to the same part of the system. Thing is, the 3/4" PVC pipe was almost completely blocked by whatever is growing in there, and now I am wondering if my evaporator coil is in similar condition. It's been at least ten years since this unit was installed, and it is a sealed unit, with no access to the drip pan for placement of tablets or chemicles to prevent the growth of what now nearly blocks my drip line. Am I going to have to pay someone to take this damn thing apart and clean it, or is it possible that I could do that? I am fairly handy with tools, but have never (yet) attempted anything like this. What say those who know about such things? I am willing to tackle it, I would just hate to screw it up.
Just for informational purposes, the evaporator sits above the blower unit (in a closet at the center of the house) and the rest of the system is up in the attic (ductwork) and outside (compressor, I believe it is called.) I guess I need to get some estimates, and talk with someone who does this professionally. In the meantime I am all ears for those who care to share their opinions on what I describe.