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

32,315

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 out of 3 people think this is helpful.

Thanx BoholMark, I'll check it out

Yea the vacuum under the hood.

1 out of 1 people think this is helpful.
32,315

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

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

F-150

Looking for a Used F-150 in your area?

CarGurus has 212,656 nationwide F-150 listings starting at $1,000.

ZIP:

Search Ford F-150 Questions

Ford F-150 Experts

#1 OJ
OJ
Reputation 6,880
#2 dandyoun
dandyoun
Reputation 4,180
#3 tennisshoes
tennisshoes
Reputation 2,510
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,307 Great Deals out of 156,238 listings starting at $1,395
Used GMC Sierra 1500
931 Great Deals out of 62,271 listings starting at $1,395
Used Dodge Ram 1500
535 Great Deals out of 12,998 listings starting at $2,199
Used Ford F-250 Super Duty
427 Great Deals out of 45,049 listings starting at $2,000
Used Toyota Tundra
626 Great Deals out of 30,696 listings starting at $2,637
Used Toyota Tacoma
627 Great Deals out of 35,082 listings starting at $2,155
Used Ford Mustang
399 Great Deals out of 44,403 listings starting at $1,000
Used Ford F-250
520 listings starting at $3,500
Used Ford Explorer
1,006 Great Deals out of 73,800 listings starting at $750
Used Chevrolet Tahoe
809 Great Deals out of 28,674 listings starting at $1,500
Used Ford Ranger
209 Great Deals out of 6,719 listings starting at $1,450
Used Jeep Wrangler
442 Great Deals out of 19,188 listings starting at $2,994

Used Cars For Sale

2017 Ford F-150 For Sale
3 Great Deals out of 100,942 listings starting at $18,940
2016 Ford F-150 For Sale
196 Great Deals out of 43,534 listings starting at $16,995
2015 Ford F-150 For Sale
200 Great Deals out of 7,337 listings starting at $17,480
2014 Ford F-150 For Sale
465 Great Deals out of 11,869 listings starting at $10,700