Defroster not working

Most likely this is due to the mode door actuator has stopped working. This is responsible for directing the air from the panel positions to the defrost and it has stopped. Normally they default to the defrost position but it may be stuck. Normally you would be able to test this by seeing if the position moved to the floor from the vents but you have a separate actuator for the floor only.

I would go ahead and replace this and go from there. I attached the info below on how to replace it. Let us know if you have questions. Thanks

Hi,

On this vehicle, there is an actuator that is responsible for changing the airflow to the defrost mode. It sounds like it failed. What I would suggest is to remove it and see if it responds when you request defrost. Here are the directions for replacement. The pics attached correlate with the directions.

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2003 Lincoln Town Car V8-4.6L SOHC VIN W
Panel/Defrost Door
Vehicle Heating and Air Conditioning Air Door Actuator / Motor Service and Repair Procedures Blend Door Actuator Panel/Defrost Door
PANEL/DEFROST DOOR
REMOVAL
1. Remove the plenum chamber.

Pic 1

2. Remove the screws and remove the panel/defrost door mode door actuator.

INSTALLATION
1. To install, reverse the removal procedure.

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Let me know if this helps or if you have other questions.

Take care and God bless,

Joe

This one is up high, but if you remove the plenum chamber, you should be able to get it.

Let me know if I can help.

Take care and God bless,

Joe

Hi,

First you need to remove the air duct system. Here are the directions. The plenum chamber removal will follow.

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2003 Lincoln Town Car V8-4.6L SOHC VIN W
Instrument Panel Air Distribution Ducts
Vehicle Heating and Air Conditioning Air Duct Service and Repair Procedures Disassembly and Assembly Instrument Panel Air Distribution Ducts
INSTRUMENT PANEL AIR DISTRIBUTION DUCTS
DISASSEMBLY
1. Remove the instrument panel. For additional information, refer to: Dashboard/Instrument Panel. See: Dashboard / Instrument Panel > Service and Repair

2. Remove the audio unit.

Pic 1

3. Remove the screws.

Pic 2

4. Remove the screws and the LH demister.

Pic 3

5. Remove the screws and remove the LH instrument panel duct.

Pic 4

6. Remove the screws and remove the RH demister.

Pic 5

7. Remove the screws and remove the RH instrument panel duct.

Pic 6

8. Remove the screws.
9. Remove the plenum chamber, defroster duct and center instrument panel duct as an assembly.

ASSEMBLY
1. To assemble, reverse the disassembly procedure.

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2003 Lincoln Town Car V8-4.6L SOHC VIN W
Removal and Installation
Vehicle Heating and Air Conditioning Housing Assembly HVAC Service and Repair Procedures Removal and Installation
REMOVAL AND INSTALLATION
REMOVAL
1. Disassemble the instrument panel air distribution ducts.

Pic 7

2. Remove the screws and remove the center instrument panel duct.

Pic 8

3. Remove the screw and remove the defroster duct.

INSTALLATION
1. To install, reverse the removal procedure.

This is a bigger job than I remember. Let me know if I can help in any way or if you have other questions.

Take care and God bless,

Joe

Sounds good. Let me know what you find or if you need help. I'll try my best from here to help.

Take care,
Joe