Mechanics

AIR FLOW FROM VENTS

1999 Ford Expedition • V8 4WD Automatic • 113,000 miles

Not getting air out of the front or back vents, only from the defrost vents.
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Erivas1207
February 10, 2011.



Check vacuum

Item Part Number Description
1 18A318 Vacuum Control motor — panel/defrost door
2 18A478 Panel/Defrost door (full vacuum position)
3 — Defrost airflow
4 — Side window demister airflow
5 18B545 Temperature blend door (full heat position)
6 19860 A/C evaporator core
7 19A813 Air inlet duct door (full vacuum position)
8 — Outside air inlet
9 18A318 Vacuum control motor — air inlet duct door
10 — Recirculated air inlet
11 19805 Blower motor
12 — Vacuum to emission control
13 — Vacuum from the engine intake manifold
14 19A563 A/C vacuum check valve
15 19A566 A/C vacuum reservoir tank and bracket
16 19B888 A/C-heater function selector switch
17 18476 Heater core
18 18A559 Floor/panel door (full vacuum position)
19 — Floor airflow
20 18A318 Vacuum control motor — floor/panel door
21 — Panel vent airflow


BMRFIXIT
Feb 11, 2011.