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

37,655

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 people found this helpful.

Thanx BoholMark, I'll check it out

Yea the vacuum under the hood.

1 people found this helpful.
37,655

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

1 people found this helpful.

Your Answer

F-150

Looking for a Used F-150 in your area?

CarGurus has 215,477 nationwide F-150 listings starting at $1,300.

ZIP:

Ford F-150 Experts

  • #1
    OJ
    Reputation
    10,220
  • #2
    dandyoun
    Reputation
    4,830
  • #3
    tennisshoes
    Reputation
    3,670
View All

Related Models For Sale

Used Chevrolet Silverado 1500
1,781 Great Deals out of 149,286 listings starting at $1,495
Used GMC Sierra 1500
722 Great Deals out of 58,462 listings starting at $1,900
Used Ford F-250 Super Duty
374 Great Deals out of 42,218 listings starting at $1,600
Used Toyota Tundra
478 Great Deals out of 38,526 listings starting at $1,999
Used Dodge Ram 1500
316 Great Deals out of 9,549 listings starting at $800
Used Toyota Tacoma
439 Great Deals out of 44,078 listings starting at $1,995
Used Ford Mustang
270 Great Deals out of 37,081 listings starting at $2,150
Used Ford F-250
401 listings starting at $2,300
Used Ford F-350 Super Duty
431 Great Deals out of 24,311 listings starting at $3,900
Used Ford Explorer
801 Great Deals out of 64,315 listings starting at $1,000
Used Chevrolet Tahoe
528 Great Deals out of 36,655 listings starting at $1,375

Used Cars For Sale

2018 Ford F-150 For Sale
79 Great Deals out of 138,368 listings starting at $17,895
2017 Ford F-150 For Sale
144 Great Deals out of 10,171 listings starting at $19,499
2016 Ford F-150 For Sale
213 Great Deals out of 8,805 listings starting at $14,500
2015 Ford F-150 For Sale
280 Great Deals out of 10,501 listings starting at $11,990
2014 Ford F-150 For Sale
414 Great Deals out of 11,726 listings starting at $7,995

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.