The A/C control knob doesn't work anymore--the air only comes out of the defrost/dash area. How do I fix this?

Asked by TGibbons27 Sep 16, 2016 at 08:15 AM about the Ford F-350

Question type: Maintenance & Repair

2005 F-350--Diesel

1 Answer
60,425

Andrew answered 7 years ago

Does temp and fan speed still work? The vents are vacuum controlled. Your truck has a vacuum motor on the passenger fenderwell. Make sure it is working and can build vacuum. If it can build vacuum find the leak. Most commonly it's related to the 4x4 hubs, which are also vacuum operated or something disconnected due to recent work.

Mark helpful

Your Answer:

Related Questions

Shortcuts

Search Ford F-350 Questions

CarGurus Experts

  • #1
    Gene Arnett
    Reputation
    300
  • #2
    BoholMark
    Reputation
    290
  • #3
    Guru932YH
    Reputation
    260
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Ford F-350 Super Duty
45 Great Deals out of 1,446 listings starting at $7,000
Used Ford F-250
6 listings
Used Ford F-150
319 Great Deals out of 13,512 listings starting at $3,888
Used Ford F-250 Super Duty
28 Great Deals out of 750 listings starting at $3,990
Used RAM 3500
41 Great Deals out of 2,071 listings starting at $18,977
Used Dodge RAM 3500
4 Great Deals out of 31 listings starting at $11,611
Used Chevrolet Silverado 2500HD
21 Great Deals out of 1,571 listings starting at $5,990
Used GMC Sierra 3500HD
31 Great Deals out of 1,330 listings starting at $19,995
Used Ford F-450 Super Duty
7 Great Deals out of 113 listings starting at $39,500
Used Chevrolet Silverado 3500HD
30 Great Deals out of 942 listings starting at $13,999
Used GMC Sierra 2500HD
32 Great Deals out of 2,112 listings starting at $8,490
Used Dodge RAM 2500
29 listings starting at $7,900
Used RAM 2500
72 Great Deals out of 2,525 listings starting at $6,995
Used Chevrolet Silverado 1500
177 Great Deals out of 7,375 listings starting at $6,995
Used Chevrolet Silverado 3500
5 listings

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.