SERVICE CALL: upon arrival homeowner stated the hvac system for second floor is not cooling properly. After complete troubleshooting I found system is in poor maintenance conditions the filter rack door is missing and the system was pulling hot air from the attic into the system gas furnace is 2008 model about 17 years old the ac unit 3 ton capacity is 2011 model About 14 years old condenser unit coil is highly impacted and creates Airflow restrictions plus check refrigerant charge levels are low that’s Indication of refrigerant leak recommend nitrogen leak test no safety to prevent water damage. By homeowner request add 2 pounds of refrigerant R 410a. ABSOLUTELY NO WARRANTY ON REFRIGERANT. SYSTEM ALREADY PAST LIFE EXPECTANCY FROM MANUFACTURE I RECOMMEND TO UPGRADE COMPLETE SYSTEM. HOMEOWNER IS AWARE OF THE CONDITIONS OF THE EQUIPMENT AND HE DECLINED ANY RECOMMENDATIONS FOR REPLACEMENT. After final inspection system Is working at this moment. Thanks for choosing Te certif