what's wrong with my a/c

Asked by Jul 20, 2014 at 11:25 PM about the 1999 Ford F-150 Work SB

Question type: Maintenance & Repair

A/c works fine until I hit a curve or take a turn, then I hear a vent or door
"thump" close under the dash. I can turn it to OFF 3 or 4 seconds then turn
back to max a/c and it blows cold again until I take another curve or turn...
Any ideas?

4 Answers

35,405

Could be the check valve to the heater/A.C. door under the dashboard is weak or the vacuum line to it is leaking.

3 of 3 people found this helpful.

Thanx BoholMark, I'll check it out

Yea the vacuum under the hood.

1 of 1 people found this helpful.
35,405

Oh good. Was it lose or just old and dried out?

1 of 1 people found this helpful.

Your Answer

F-150

Looking for a Used F-150 in your area?

CarGurus has 184,580 nationwide F-150 listings starting at $699.

ZIP:

Ford F-150 Experts

  • #1
    OJ
    Reputation
    8,940
  • #2
    dandyoun
    Reputation
    4,550
  • #3
    tennisshoes
    Reputation
    3,070
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,108 Great Deals out of 167,056 listings starting at $1,900
Used GMC Sierra 1500
879 Great Deals out of 65,553 listings starting at $2,495
Used Ford F-250 Super Duty
361 Great Deals out of 44,819 listings starting at $1,799
Used Dodge Ram 1500
356 Great Deals out of 10,908 listings starting at $1,500
Used Toyota Tundra
460 Great Deals out of 32,469 listings starting at $1,999
Used Toyota Tacoma
628 Great Deals out of 43,329 listings starting at $1,500
Used Ford Mustang
724 Great Deals out of 38,098 listings starting at $895
Used Ford F-250
468 listings starting at $6,694
Used Ford F-350 Super Duty
331 Great Deals out of 24,327 listings starting at $2,488
Used Chevrolet Tahoe
651 Great Deals out of 39,640 listings starting at $1,000
Used Ford Explorer
852 Great Deals out of 64,021 listings starting at $1,000

Used Cars For Sale

2018 Ford F-150 For Sale
35,710 listings starting at $19,855
2017 Ford F-150 For Sale
124 Great Deals out of 77,958 listings starting at $17,989
2016 Ford F-150 For Sale
119 Great Deals out of 7,805 listings starting at $18,989
2015 Ford F-150 For Sale
302 Great Deals out of 10,873 listings starting at $15,995
2014 Ford F-150 For Sale
431 Great Deals out of 13,926 listings starting at $10,995

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.