Question about 1999 Dodge Ram

1 Answer

Ventilation control problem with 1999 Dodge Ram, Cannont redireect air. In all placements of air direction, only go"s though window defrost.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 447 Answers

There is most likely a leaky vacuum line under the hood somewhere that supplies the vacuum needed to move the air mode doors around. Usually I find that the line line is disconnected or broken, often by the passenger side of the intake manifold. Most of the time the line is about 1/8" diameter and made of black plastic. There is more than on line in that area so you may have to carefully inspect all of them to find the problem. Sometimes there is a vacuum diagram under the hood that will show the routing of the lines but often it doesn't include the supply line for the air doors. Hope this helps you find your problem!

Posted on Jul 07, 2010

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

1999 durango vent control switch will not let AC blow threw vents only defrost

Usually this is a problem with the blend doors under the dash. You either have a vac leak, a dead motor, or a faulty door.
The control opens and closes the doors to direct air thru the heater core and evaporator core along with directing air thru the vents.
When a problem occurs, the default position is the defrost vents to make sure the windshield remains clear.
You can do an internet search for "repair durango blend door" for more info.

Jul 29, 2012 | 1999 Dodge Durango

1 Answer

Where is the map sensor located on the ram 1500 5.2l

The MAP sensor is bolted directly to the front of the throttle body under the air filter assembly. Requires a Torx Bit to remove (Not sure of the size though). Be careful not to break the small 90 degree rubber vaccuum connector when removing

Mar 03, 2011 | 1999 Dodge Ram

1 Answer

I have a 1999 Dodge Ram 1500 Pick Up, my heater works, but I cannot get the air flow to switch from the floor to vent, or defrost or the blend of defrost and floor. Basically, all I have is floor air. I...

Hi,have you checked your fuses and relays. You can pull glove box out and look and see if the door motors or working ,if they are moving when you turn the mode switch the doors could be broken . You can take the motor off and try to turn by hand and see if they close. Most common problem is were motor connect to door usely break or crack.Thanks if i can help you further just re post.

Jan 07, 2011 | 1999 Dodge Ram

1 Answer

Heat does not come out passenger side of the car but comes out drivers side

There is a blend door problem.

prev.gif next.gif HEATING AND AIR CONDITIONING Refer to Section 1 for discharging and charging of the air conditioning system. The heating system provides heating, ventilation and defrosting for the windshield and side windows. The heater core is a heat exchanger supplied with coolant from the engine cooling system. Temperature is controlled by the temperature valve which moves an air door that directs air flow through the heater core for more heat or bypasses the heater core for less heat. Vacuum actuators control the mode doors which direct air flow to the outlet ducts. The mode selector on the control panel directs engine vacuum to the actuators. The position of the mode doors determines whether air flows from the floor, panel, defrost or panel and defrost ducts (bi-level mode).

Oct 28, 2010 | 1998 Oldsmobile Regency

1 Answer

Ac air comes out on the defrost vents only why?

You have probably lost your vacuum source going to your control, when it has no vacuum it automatically resets itself to defrost as a built in safety feature.

Jun 30, 2010 | 1999 Dodge Ram

1 Answer

I would like to understand how the blower switches the air flow from the dashboard to the vents to the floor ie in defrost, AC, or heater modes.

There are several panels, or doors, which are springloade to be one way, and are moved by vacuum diaphragms and rods to the other extreme of their travel.

When you move the controls, you direct vacuum here or there, or remove it from here or there, causing these panels to open or close pathways for the blower air to go through.

Jun 19, 2010 | 1999 Dodge Ram

1 Answer

Heater fan only works on "high speed"

All cars are designed with a blower fan motor that pushes air through the ventilation system. This air is processed by a series of vents to direct the air to various positions. Example: heater, air conditioner and defrost modes. Most blower motors are power by a basic electrical circuit that utilizes a multi resistor or a solid-state resistor to control different fan speed modes (low, medium low, medium and high). If the resistor malfunctions it may lose one or more of the lower fan speed settings.
google_protectAndRun("ads_core.google_render_ad", google_handleError, google_render_ad);

Mar 02, 2010 | 1999 Buick Century

2 Answers

My driver side ac blows cold, passenger side blows warm. whats the problem? 2004 ram 1500 reg cab.

A shutter is out of position, May be able to adjust under passenger dash. Move the controls to spot your target and then sync the contrpol with the shutter position, Good Luc,Ned

Sep 25, 2009 | 2005 Dodge Ram 1500

2 Answers

Blower works on all speeds but minimal air comes out

youve got a bad blower motor resister. buy a haynes manual and the resistor and have a windy day again.

Jun 05, 2009 | 2004 Dodge Ram 2500

Not finding what you are looking for?
1999 Dodge Ram Logo

492 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dodge Experts


Level 3 Expert

74945 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7697 Answers

Are you a Dodge Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides