I recently bought a house on foreclosure. The air conditioner line set was stolen before we purchased the home and it has sat for over a year. One contractor gave me a price to replace the lineset, but another contractor told me that since the R410 unit has been exposed to the air it could have moisture in it and that I need to replace the whole unit. He said that if I have the lineset repaired the unit may work, but it will cause damage to the unit and it won't last very long. Wanted some advice on which one to believe.