Anyone have a vacuum diagram for the '99 F350 with gas?

 

Assuming you want the HVAC portion (since you're in the HVAC section);




Item Part Number Description
1 18A318 Vacuum Control Motor — Panel/Defrost Door
2 18A478 Panel/Defrost Door (Full Vacuum Position)
3 — Defrost Air Flow
4 18B545 Temperature Blend Door (Full Heat Position)
5 19860 A/C Evaporator Core
6 19A813 Air Inlet Duct Door (Full Vacuum Position)
7 — Outside Air Inlet
8 18A318 Vacuum Control Motor — Air Inlet Duct Door
9 — Recirculated Air Inlet
10 19805 Blower Motor
11 18476 Heater Core
12 18A559 Floor/Panel Door (Full Vacuum Position)
13 — Floor Air Flow
14 — Vacuum Source
15 19A566 A/C Vacuum Reservoir Tank and Bracket
16 19B888 A/C-Heater Function Selector Switch
17 18A318 Vacuum Control Motor — Floor/Panel Door
18 — Panel Vent Air Flow

 

ihave a 2000 f350, the heater works, but only stays on defrost, also wont switch to A/c could it be the dail on the dash, or a bigger problem?

 

See the FAQs above....