F 350 4WD Pickup V8-351 5.8L VIN H EFI (1997)
Air Duct: Service and Repair
Heating and Defrosting
Defroster Ducts
The defroster duct and ventilation ducts are a two-piece, adhesively bonded construction that attaches as an assembly to the instrument panel.
Demister and Demister Ducts
REMOVAL
1. Remove the instrument panel.
2. Remove two nuts attaching the A/C side window demister and hose and one nut and one spring nut attaching the A/C side window demister and
hose nozzles to the instrument panel. These nozzles are located in opposite corners of the instrument panel.
3. Disconnect the flexible hoses that slide over the input end of each nozzle.
4. Remove three push screws that attach the A/C demister hose connector to the structural duct assembly. Disconnect the flexible hoses that slide
over the input end of each nozzle.
INSTALLATION
1. To install nozzles, hoses, and connector, install two retaining nuts to the A/C side window demister and hose, and one nut to the A/C side window
demister and hose. Attach three push screws through the A/C demister hose connector into the structural duct.
2. Slide the demister hoses over their attaching locations.
3. Install instrument panel.
Outlet Floor Duct
REMOVAL
1. Remove the vacuum hose harness from the stowage slot in the heater outlet floor duct.
2. Remove the plastic retaining screw from the bottom side of the heater air plenum chamber.
