Perform 1 system diagnostic for upstairs unit. Found thermostats with no power and blown fuse. Found loose low voltage wire touching causing blown fuse. Unit has improper sediment trap. Blower wheel was dirty, condenser coil dirty rustling in burner cabinet, and no te flood protection. Customer wanted to do bare minimum work to get unit operational at this time. System is heating. The bare minimum basic repairs to get the system running today.