F 250 4WD Super Duty V10-6.8L VIN Z CNG (2003)
8. Remove 5 screws from the heater core cover.
NOTE: The remaining 3 screws securing the heater core cover will be removed once the air conditioning and heater assembly is removed.
9. Disconnect the electrical connectors and set the wiring assembly aside.
10. Remove the fasteners and remove the lower air duct.
11. Disconnect the refrigerant lines.
CAUTION: Place protective caps over the open refrigerant lines to avoid contamination of the A/C system.
