re: Update - Not a plumbing issue. The coils in my AC are leaking

Just went through this similar headaches with my unit. Condensate line had a lot of buildup and bleach wasn’t doing the trick. Safe T switch in the line wasn’t functioning so water was draining back into the pan. Caught it before the pan float shut the system off.

I ended up replacing the 3/4 pvc run from the unit to where it tied to my vent, and properly supporting it every 4 feet as per code. It wasn’t supported previously so a few feet past the unit it was running flat on top of the ceiling joists. I also added some of the condensate chlorine tablets to hopefully prevent buildup in the future.