I have a 25 year old carrier unit and it has not problems with the primary drain, but the home inspector says we should have a secondary line connected. It has a place for a secondary line but we have no possible way to get this line from the second floor to the crawl space. Help!

A condensation pump,, works like a sump pump, when water level get to a certain point in the tank it comes on and pumps the water wherever you have routed the drain to,, look into it,, it just might answer your problems