Air only flows through the defrost no matter what setting is used

10

Asked by Jul 23, 2014 at 03:32 PM about the 2002 Ford Taurus SES

Question type: Maintenance & Repair

I only have defrost, when the vent setting or leg setting is used.

4 Answers

36,145

The ventilation system is in default mode.

5 of 5 people found this helpful.
105,255

Do you have a digital readout for the heat A/C system or just knobs for controls?

1 of 1 people found this helpful.
10

Just knobs for controls

1 of 1 people found this helpful.
105,255

The modes are controlled by vacuum on this system, you need to check the source vacuum supply to the heater control that will be under the hood and come out of the firewall. If the source hose and supply is good then you will have to remove the heat/ radio cluster to gain access to the vacuum lines for mode control to test them, if they heck good them it is most likely that you have a failed vacuum servo motor that controls the door for mode control. Fords default setting is defrost if a vacuum leak or no vacuum is present.

4 of 4 people found this helpful.
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