AC precision tune up. Clean and tune up AC; cleaned condenser coil, checked all outdoor electrical components, tested indoor air flow, checked refrigerant levels, and tested overall AC operation. Homeowner stated the system was lagging and struggling to keep up yesterday. Homeowner also stated they had replaced there air filter yesterday as well. Checked over entire system and found the major issue being incorrect sizing. The furnace will always push to much airflow causing the air conditioner to not work efficiently and potentially generate major issues in the future. Also found the blower wheel to be dirty this will decrease airflow potentially up to 30%. Pulled and cleaned blower wheel to increase air speed and performance. All other recommendations declined at this.