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

Question type: Maintenance & Repair

2005 F-350--Diesel

1 Answer

19,245

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.

Your Answer

Ford F-350 Experts

  • #1
    tennisshoes
    Reputation
    140
  • #2
    BoholMark
    Reputation
    120
  • #3
    F_O_R
    Reputation
    100
View All

Related Models For Sale

Used Ford F-350 Super Duty
312 Great Deals out of 24,103 listings starting at $2,488
Used Ford F-250
477 listings starting at $6,694
Used Ford F-250 Super Duty
378 Great Deals out of 44,647 listings starting at $1,799
Used Ford F-150
2,318 Great Deals out of 183,060 listings starting at $1,000
Used Dodge Ram 3500
86 Great Deals out of 2,247 listings starting at $3,950
Used Ford F-450 Super Duty
48 Great Deals out of 2,401 listings starting at $3,995
Used Dodge Ram 2500
156 Great Deals out of 5,002 listings starting at $2,999
Used Chevrolet Silverado 2500HD
313 Great Deals out of 29,149 listings starting at $2,995
Used Ram 3500
110 Great Deals out of 18,405 listings starting at $14,900
Used Chevrolet Silverado 3500HD
92 Great Deals out of 9,921 listings starting at $6,950
Used Chevrolet Silverado 3500
24 Great Deals out of 553 listings starting at $6,990
Used GMC Sierra 2500HD
110 Great Deals out of 13,470 listings starting at $2,999
Used Chevrolet Silverado 1500
2,125 Great Deals out of 167,340 listings starting at $1,995
Used GMC Sierra 3500HD
51 Great Deals out of 4,351 listings starting at $10,900
Used Ram 2500
146 Great Deals out of 29,926 listings starting at $7,350

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.