# Ford AC Trouble

**URL:** <https://community.cartalk.com/t/ford-ac-trouble/4047>\
**Category:** Maintenance/Repairs\
**Created:** [September 2, 2007, 6:03pm UTC](https://community.cartalk.com/t/ford-ac-trouble/4047 "2007-09-02T18:03:01Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![ukcolin](https://avatars.discourse-cdn.com/v4/letter/u/9fc29f/32.png) [@ukcolin](https://community.cartalk.com/u/ukcolin)\
**Post date:** [September 2, 2007, 6:03pm UTC](https://community.cartalk.com/t/ford-ac-trouble/4047/1 "2007-09-02T18:03:01Z")

</div>

I have a 99 Ford Ranger 4 Cylinder truck. I have about 127,000 miles on it. When I have the ac on Max AC, anytime I press on the gas pedal, the ac quits blowing out of the dash vents and starts blowing out of the defroster vents on top on the dash. Also, when I have the switch in the off position, it will blow out of the floor vents. Now, it doesn’t do this when the switch is just on regular ac. The mechanic I took it to said he thought it was a vapor leak but couldn’t find it. What can I do or should I just live with it on regular ac?  
  
  
  
 Thanks in advance.  
  
 Colin

---

<div class="post-metadata">

**Author:** ![Big\_Riviera\_1990](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/big_riviera_1990/32/43_2.png) [@Big\_Riviera\_1990](https://community.cartalk.com/u/Big_Riviera_1990)\
**Post date:** [September 2, 2007, 10:43pm UTC](https://community.cartalk.com/t/ford-ac-trouble/4047/2 "2007-09-02T22:43:55Z")

</div>

Vacuum leak at the switch/control assembly, or in the lines running to the air door motors.

-Matt