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I need info on the blend air door for a 1998 Ford Econoline

Customer Question

I need info on the blend air door for a 1998 Ford Econoline E250 model
Submitted: 7 years ago.
Category: Ford
Expert:  lostrider replied 7 years ago.

HiCustomer Thank you for asking your question on JustAnswer. The other Experts and I are working on your answer. By the way, it would help us to know:
-What type of engine is in your Ford?
-What type of information do you need?

~What is the concern your having?

Thank you again for trusting us with your problem. Please reply as soon as possible so that we can finish answering your question.

Customer: replied 7 years ago.

4.2 V-6

I dont have any heat just a/c,it slowly started to fail sometimes heat sometimes not.the heater core is not plugged both heater lines are hot (in-going & out-going) I replaced the little t-stat dial control on the dash to no avail.I believe the blend air door has failed in the a/c mode either the actuator or the arm linkage what i was needing is the blown up schematic parts detail or info where the actuator actually is locted under the dash.

Expert:  lostrider replied 7 years ago.
Thank you for the reply, this is a common concern on the Econolines, there is a heater case problem, the actuator arm binds and breaks the blendoor, the heater case is the recommended repairs. here is a diagram of the component locations.

Control Components

The manual climate control system heats or cools the vehicle interior depending on the function selector position and the temperature selected. Function selector position determines heating or cooling and air distribution. The temperature blend control setting determines air temperature.

The manual climate control components are used to:

  • select air inlet source (outside or recirculated).
  • select blower motor speed.
  • select discharge air temperature (temperature blend).
  • select discharge air location (defrost, panel, floor).
  • select A/C compressor clutch operation.
Component Locations
ItemPart NumberDescription
1 18A318 Vacuum Control Motor-(Floor/Defrost Door)
2 18A318 Vacuum Control Motor-(Panel Door)
3 18A318 Vacuum Control Motor-(Air Inlet Door)
4 19E616 A/C Electronic Door Actuator Motor
5 18591 Heater Blower Motor Switch Resistor
6 19980 Manual A/C Control Assembly



Here is the removal and install for the blendoor actuator.


Actuator-A/C Electric Blend Door



  1. Disconnect the battery ground cable.
  1. Remove the A/C electronic door actuator motor (19E616).
    1. Disconnect the A/C electronic door actuator motor connector.
    1. Remove the four screws.
    1. Remove the A/C electronic door actuator motor.


  1. To install, reverse the removal procedure.


Here is a copy of the service bulletin for the heater case.

Publication Date: MARCH 16, 1998


This TSB article is being republished in its entirety to include 1998 model year vehicles and correct the build date of the affected vehicles.


Absence of temperature control on some vehicles may be due to the blend door actuator shaft having an interference fit with the blend door, thus causing the blend door to break.


Replace the heater case assembly with a revised heater case assembly. Refer to the following Service Procedure for details.


  1. Open both driver and passenger side doors.
  2. Install memory saver module, then disconnect battery negative cable.
  3. Drain cooling system.
  4. Using Heater Hose Disconnect Tool (T85T-18539-AH), disconnect and plug heater hoses from the heater core.
  5. Remove inside engine cover.
  6. Remove passenger side instrument panel finish panel.
  7. Remove driver side instrument panel finish panel.
  8. Remove passenger side instrument panel finish panel reinforcement.
  9. Remove passenger side instrument panel dash brace.
  10. Remove top instrument panel retaining screws.
  11. Remove upper left access panel.



  12. Loosen instrument panel-to-main bracket retaining nut.
  13. Remove instrument panel-to-center finish panel retaining bolts.
  14. Slightly raise the instrument panel, then place a 38.1mm thick by 101.6mm long by 101.6mm wide (1-1/2"x4"x4") block of wood on the right front portion of the engine cover opening. This will hold the instrument panel in a raised position.
  15. Remove RH kick panel from the engine cover side.
  16. Remove heater case cover.
  17. Remove heater core.
  18. Disconnect the door temperature blend actuator wiring.
  19. Remove heater case assembly.
  20. Install revised Heater Case Assembly (F7UZ-18478-CA).
  21. Transfer temperature blend door actuator to revised heater case assembly.
  22. Reverse Steps 1-19 for installation of the revised heater case assembly. Tighten instrument panel bolt to 2-3 N-m (18-27 lb-in).

F7UZ-18478-CAHeater Case Assembly


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