Blend Door?

[ragboat]

Where is the front blend door on 2001 EB and what actuates it? I have no airflow in the front but I can hear the blower running. I had poor front AC this summer and now poor front heat. The rear works fine.
Dave

 

[stamp11127]

The blend door is above the trans tunnel and actuated by a motor at the bottom. If you are having issues with the distribution it is another actuator that controls that function. There have been issues with loss of vacuum to the selector control. Take a look at the vac line at the engine and under the battery for possible leaks.

 

[ragboat]

Thank you. Checking now.

 

[Bedrck47]

vacuum print

 

[ragboat]

Thanks for the schematic. Is there any key for the item numbers? Right now I get strong airflow to the defroster ducts in all settings except vent. I get strong flow out the panel vents when I select vent. Weak airflow at the floor. It looks like I have a distribution problem. I will need to get back to it later when I have more time. Have to get to work.

Thanks,
Dave

 

[Bedrck47]

Vacuum Schematic—Electronic Automatic Temperature Control

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 19980 Electronic automatic temperature control module
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



Vacuum Connector End View—Electronic Automatic Temperature Control

Item Part Number Description
1 — Not used
2 Red Panel/defrost door
3 Blue Floor/panel door
4 Black Source vacuum
5 White Air inlet duct door
6 Yellow Floor/panel door


VACUUM APPLICATIONS CHART—ELECTRONIC AUTOMATIC TEMPERATURE CONTROL Vacuum Harness Hose Color Function Manual Override Selector Buttons
OFF MAX A/C VENT PNL and FLR FLOOR FLR and DEF DEFROST
White Outside-recirc V V NV NV NV NV NV
Yellow Full floor NV NV NV NV V NV NV
Blue Floor-panel (partial) NV NV NV V V V NV
Red Panel-defrost NV V V V NV NV NV
Black Source V V V V V V V

V = vacuum

NV = no vacuum

 

[ragboat]

Thank you. This will help a lot.
Dave