1. Check thermostat function, settings and location
2. Check and lubricate furnace fan motor, as applicable
3. Check blower motor amps, as applicable
4. Check filter system and clean or replace if needed
5. Check contactor and clean as required
6. Inspect condenser fan motor and blades
7. Check condenser coil and clean as required
8. Check compressor
9. Check refrigerant pipe temperature
10. Check evaporator temperature drop
11. Check humidifier damper position
12. Check condensate pump and lines, and clean as required
13. Inspect electrical connections, and tighten or clean as required
14. Check capacitors for leakage
15. Check electrical loads and current draw
16. Clear debris from condenser
17. Inspect service valve
18. Clean blower area, not including blower removal
19. Inspect evaporator coil and clean as required, if accessible
20. Locate or identify system switch and/or breaker
21. Check system performance and air distribution