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

33,805

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.
33,805

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

1 of 1 people found this helpful.

Your Answer

Add photo

Related Questions

  • I have a 2004 ford f-150 and the heat stopped working, any ideas what's wrong? 2 answers

    It has anta freeze but idk what's wron.

    2004 Ford F-150 Lariat Ext. Cab 4WD

    -

    Maintenance & Repair

  • what's wrong and can I fix it myself? 3 answers

    Turned ignition switch, steering wheel unlocked, heard faint click, nothing else, started with solenoid, but gear shift won't release. replaced ignition lock and cylinder, doing same thing.

    1987 Ford F-150

    -

    Maintenance & Repair

  • What's wrong, 2010 F150 4.6L will not start 1 answer

    Tried to start truck this morning. Turned the key to the start position, the engine turned over but would not start. Released the key and the engine continued to turn over, when not in the start p...

    2010 Ford F-150 FX4 SuperCab 4WD

    -

    Maintenance & Repair

  • Windshield wipers will not work on my Ford F-150 Truck. What's wrong? 2 answers

    I have a Ford F-150 LX Standard cab Truck every time it rains my windshield wipers will not work. I need help to resolve this problem.

    1998 Ford F-150 XL LB

    -

    Maintenance & Repair

  • what's wrong with my Ford 6 answers

    OK so Ijust bought a 1983 Ford F150 4X4.. When you start it, it will run for about 5 seconds but then it dies. But before it dies you can turn the key and bump the starter and it will idel back ...

    1983 Ford F-150 STD Standard Cab 4WD LB

    -

    General

F-150

Looking for a Used F-150 in your area?

CarGurus has 206,316 nationwide F-150 listings starting at $1,499.

ZIP:

Search Ford F-150 Questions

Ford F-150 Experts

#1 OJ
OJ
Reputation 7,920
#2 dandyoun
dandyoun
Reputation 4,360
#3 tennisshoes
tennisshoes
Reputation 2,750
View All

Related Models For Sale

Used Chevrolet Silverado 1500
1,717 Great Deals out of 175,749 listings starting at $1,250
Used GMC Sierra 1500
822 Great Deals out of 68,199 listings starting at $2,484
Used Dodge Ram 1500
455 Great Deals out of 11,152 listings starting at $700
Used Ford F-250 Super Duty
346 Great Deals out of 46,938 listings starting at $1,895
Used Toyota Tundra
443 Great Deals out of 34,312 listings starting at $2,700
Used Toyota Tacoma
541 Great Deals out of 40,814 listings starting at $2,495
Used Ford Mustang
476 Great Deals out of 45,735 listings starting at $1,999
Used Ford F-250
481 listings starting at $3,475
Used Ford Explorer
945 Great Deals out of 72,519 listings starting at $1,000
Used Chevrolet Tahoe
550 Great Deals out of 29,234 listings starting at $1,699
Used Ford Ranger
197 Great Deals out of 5,805 listings starting at $1,650
Used Jeep Wrangler
276 Great Deals out of 18,163 listings starting at $2,950

Used Cars For Sale

2017 Ford F-150 For Sale
32 Great Deals out of 128,121 listings starting at $18,445
2016 Ford F-150 For Sale
122 Great Deals out of 17,380 listings starting at $18,848
2015 Ford F-150 For Sale
187 Great Deals out of 7,904 listings starting at $17,900
2014 Ford F-150 For Sale
382 Great Deals out of 12,590 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.