In a "typical" split-type system in an area like Texas, with the furnace/condenser coils in the attic and compressor outside, what is the typical way condensation is drained? Seems it involves two lines - a primary that routes to a bathroom pee trap and secondary to the outside. Also an overflow pan is placed under the condenser/furnace.
Considering the above: (1) If I have a slow drip from under the unit into the overflow pan, is this a sign of something wrong? (2) If the primary line is completely free, should the secondary have any flow? The way the unit is aligned/tilted, the secondary drain entrance will come first, then the primary, this seems backwards. This secondary line drains directly into the overflow pan, hence water will constantly be in the pan, leading to eventual rust.