1. Lubricate Motors
2. Adjust controls if needed
3. Adjust combustion air to burners
4. Check fan belts
5. Change filters, standard pleated filters included.
6. Check air temperature rise
7. Check wiring & connections
8. Clean burners
9. Check for gas leaks in furnace
10. Check heat exchanger for cracks
11. Check performance of system
12. Check heat strips
13. Check heat pump in heating mode
14. Check heat pump in defrost
15. Clean heat exchanger