heat
i meant vac lines too!
I beleive its the blend door tho, and i think ihave to yank the dash out to fix it.
all the vacuum lines hook to doors to move air up or down...the center knob for temerture ia cable operated.. here are the steps i will try to send pics they have 1 on every step...doesnt loSECTION 412-04: Control Components 2003 Mustang Workshop Manual
REMOVAL AND INSTALLATION Procedure revision date: 03/18/2002
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Control Assembly Printable View (134 KB)
Special Tool(s) Remover, Heater Control Cable Retainer
412-088 (T94P-18532-A)
Removal
Remove the center instrument panel register. For additional information, refer to Section 412-01 .
Remove the screws.
Disconnect the connectors.
Using the special tool, disconnect the temperature control cable from the control head.
Remove the nuts and disconnect the vacuum connector.
Installation
Align the blend door driver to the full heat position.
Place the temperature control knob in the full WARM position.
Attach the cable drive to the control head.
Rotate the knob back and forth from full WARM to full COOL.
Check the cable control for correct range of movement.
Connect the electrical connectors.
Install the vacuum connector and nuts.
Install the control head.
Install the center instrument panel register. For additional information, refer to Section 412-01 .
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ok hard only a couple of pieces