answersLogoWhite

0


Best Answer
Copy

usally it is because of a cracked vaccume line(hose) from the intake manifold to the dash controls.usally heat makes the line crack-some vaccume canisters develope a crack in them - this will cause the same problem probably the vacum value connected to the vent controls. If there is a broken vacumn line or if the value is bad, it could cause this to happen

User Avatar

Wiki User

โˆ™ 2004-06-14 08:16:32
This answer is:
๐Ÿ™
0
๐Ÿคจ
0
๐Ÿ˜ฎ
0
๐Ÿ˜‚
0
User Avatar

Add your answer:

Earn +5 pts
Q: What makes the AC on a 1989 Ford F-150 not blow from the dash vents and only the defroster?
Write your answer...
Submit

Related Questions

Where is the headlight on-off light sensor for a Ford F150?

if you are talking about the automatic sensor that automatically turns the lights on and off, it is on the dashboard probably in between the defroster vents it is probably a small plastic or glass bubble usually you have to remove a large portion of the dashboard to replace it


Why would the ac change from dash vents to the defrost vents when accelerating in a Ford F150?

You are having a vacuum loss. Check the hard plastic line that is on the right side under the hood for holes. I replaced mine and it fixed the problem. 1992 F150


How do you remove ac vents on F150?

The Ford F1 50 air conditioning vents are held in place by four retaining clips. Pry outward on each retaining clip. All of the air conditioning vents can be removed this way.


What is the Curb weight of a 1989 Ford F150?

approximately 4013 lbs.


Why won't my 1989 F150 start?

One reason a 1989 F-150 may not start is a bad battery.


What is the spark plug gap for a 1989 F150 with a 300 engine?

www.motorcraft.com shows (.044 inch ) plug gap on the 1989 F150 300 cubic inch ( 4.9 L ) straight 6 cylinder engine


Why might the heater in a 95 F150 not produce heat through the vents even though all fluids flaps and core work properly?

this is my truck and i have exhausted my options i have also replaced the thermostat. It's not just the dash vents it's also the defroster and floor. The heater cor works fine and the cold/hot cable is still connected on each end and the vent flap works to. please give me some suggestions. E-mail me at biddle26@yahoo.com thanks


Where is cylinder 1 on 1989 ford f150 5.8L?

front passenger site


Need Radio wiring diagram 1989 Ford Pickup F150?

Yes.


Where is your knock sensor on a 1989 4.9L F150?

to the rite and just below the coil


Can a 1989 bronco 302 engine swap into a 1995 F150 302?

sure can!


1999 ford f150 with smell of anti-freeze through ac vents?

If antifreeze is filtering through your ac vents, other toxins could also be coming through. Don't take chances; see a mechanic.


Will a 4.2 liter Ford Freestar engine work in a F150?

No. The F150 installation is longitudinal and the Freestar is not. That makes the manifolding incompatible.


Does a 1989 f150 have an obdII port?

No , there is probably an EEC TEST connection in your engine compartment


What other ford gas tank will fit a1965 ranchero?

1989 Frod F150


Where is the location of abs sensor on 1989 F150 pick up truck?

can i see a diagram of the location of the abs sensor on 1989 F-150?


What is the headlight adjustment for a 1989 F150 2WD?

The headlight adjustment for the 1989 F150 2WD is below the actual headlight. You will need to pull the tab at the top of the headlight up to release the headlight and then you can adjust the angle of the light with the long bolt below the housing.


What is the most popular model Ford makes?

Ford F150 Pickup.


Does the 89 F150 4.9 have a DPFE sensor?

www.motorcraft.com doesn't list a DPFE sensor for the 1989 F150 with a 4.9 L ( 300 cubic inch ) straight 6 engine


What is the brake fluid capacity for a 1989 Ford F150?

Fill reservoir 1/2 pint?


Why dont you have power to the fuel relay on a 1989 ford f150?

check to see if the fuse is bad


How do you remove computer on a 1988 ford f150?

how do i remove the computer on a 1989 ford f-150


How do you adjust a fast idle on a 1989 Ford F150 302?

probably a bad idle air controller.


1989 Ford F-150 fuse box diagram?

fuse boxs ford f150


What causes a 1989 Ford F150 to have no electrical power?

dead battery , poor cable connection to battery