Replace geothermal unit. Disconnected all electrical connections, loop field connections and drain connections. Disconnected from ductwork and removed unit. Installed new geothermal unit. Reconnected to existing ductwork, drain and electrical connections. Installed electric back up heat. Installed new washable filter. Connected loop field and purged air from unit and loop field. Ran and tested geo unit. All systems operating properly at this time. Thanks, Brennan, Scott