I am posting this question for a coworker who appreciates my ability to do internet research. Please bear with me as I know just enough about HVAC to make me dangerous.
In a typical install does the condensate line drain directly from the tray that the exchanger sits on or does it drain from within the unit?
She has a 5 year old system with the exchanger in the attic. She has rusty water coming from the condensate line. She caught some water in a jar and there is sentiment in the water. She says that the tray in the attic has no signs of discoloration and was dry.
Should she be concerned?