Fresh Air Flow Cannot Be Adjusted

Fresh Air Flow Cannot Be Adjusted

No Fresh Air Flow From Instrument Panel Or Footwell Vents







Test condition:
- Fresh air fan runs in all four stages.

Test procedure:
- Set control knobs as shown in illustration.
- Button -1- for A/C Switch (E35) was not pressed.
- Button -2- for fresh air and recirculating air flap was not pressed.
- Check components and functions according to the following:

3 - Temperature flap
- Temperature flap -3- must be heard to fall into position when the control knob (center) is turned back and forth from its end position "cold".
- Adjust temperature flap lever arm.

4 - Center Flap
- Air flow to the instrument panel and footwell vents -9-, -10- (residual air is forced to the windshield).
- Adjust lever arm.

5 - Fresh air and recirculating air flap
- Fresh air intake -11- is open.
- Vacuum unit -6- is released.
- Check vacuum hoses as per vacuum hose connection diagram Vacuum and Vapor Hose Diagrams
- Check Fresh Air/Recirculating Flap Two-Way Valve (N63) using wiring diagram.
- Check Fresh Air/Recirculating Flap Switch (E159) using wiring diagram.