DCM1: AC complete, replaced 16x20x1 filter. System is fully functional and operating within manufacturer specifications at this time. Found dirt buildup on blower wheel, furnace is from 2005. Checked evaporator coils they are clean, coils are from 2021. Refrigerant pressures and temperatures are appropriate for indoor and outdoor weather conditions. Temp split 19. Talked to homeowner about cleaning blower because dirty blower can cause indoor coils to also become dirty. He decided to wait on cleaning blower wheel.