ROOFTOP HVAC UNITS: 1. Inspect units for proper refrigerant levels. Add additional refrigerant if required. 2. Inspect, clean coils, and cabinets. 3. Inspect fans on bases for restricted drain openings. Remove any obstructions as necessary. 4. Inspect compressor and associated tubing for damages. Replace as needed. 5. Inspect fans motors and fan blades for wear and damage. Replace as needed. 6. Inspect control box associated controls, accessories, wiring, and connections for wear. Repair as necessary. 7. Inspect blower assembly. 8. Inspect combustion blower housing. Clean as necessary. 9. Inspect burner assembly. Clean and adjust. 10. Inspect heat exchanger or heating elements. Replace as necessary. 11. Inspect flue system. Proper attachment, dislocated sections, or any signs wear or damage. Repair as necessary. 12. Inspect system startup for any abnormal noises or unusual odors. Repair as necessary. 13. Inspect systems high and low side system pressure. Repair as necessary 14. Inspect gas furnace system for manifold gas pressure and adjust as needed. 15. Inspect systems for correct line and load voltage and amperage...