No heat. Check and find customer replaced his tstat with ecobee tstat and was not set up properly and wire wrong for zone 2 tstat. Help setup tstat and remove O for zone 2. And heating system operate. Test and find heatpump system operating with faulty voltage absorption system and molded airhandler. Complete cleaning for evaporator coil airhandler assembly and complete voltage absorption renovation HN4C with performance enhancement added to help system start up better and reduce load. System operating at this time.