Today I arrived on site and completed the following maintenance tasks: **Indoor Unit (Furnace in Closet - Upstairs Area):** * Replaced the 20x20x1 antimicrobial filter using customer-supplied spares. * Confirmed the indoor coil is in good condition. **Outdoor Unit (Straight Cool - Side of House):** * Verified the outdoor coil is in good condition. * Confirmed electrical wiring is working within manufacturer's specifications. **System Components:** * Inspected and verified the blower wheel, burners, exhaust flue, heat exchanger, primary drain pan, secured electrical wires, and ductwork are in good working condition. **Testing & Adjustments:** * Tested for carbon monoxide; result was 0.00 PPM. * Measured return air temperature at 74.0°F and supply air temperature at 96.8°F. * Cleared the condensate drain line, cleaned the primary pan, tested the safety switch, and cleaned out the condensate pump. **Additional Actions:** * Dusted the thermostat and tested its o