Question about 1998 Dodge Ram 1500 4WD

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Air only comes through the floor vents

It does not matter what selection I make on the dashboard the air will not switch to the dash vents or the defrost. The heat and air work fine and the fan blows hard but I cannot get it to come through any place but the floor. Could a hose be disconnected that directs the air or is it all plastic channels with flaps?

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  • 8 Answers

You may have a disconnected control cable, either on the back of the control assembly or at the flap. More information about the car make and year would be useful.

Posted on Nov 22, 2013

  • Mark Erwin Nov 22, 2013

    1998 Dodge Ram 1500, 4x4. I am not certain what more I can give since most of the ventilation is cookie cutter at best. Thanks for the input it is something to look at further.

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: air only blows on floor with very little coming out the defrost or regular vents.

Hope you have the same set up, sure you do. You may have either crossed your vaccum lines or when you were putting your heater/ac box back together or you may of pinched the vents somewhat closed. Cycle through the different zones to ensure the vents are moving as your are selecting (defrost, floor, ect...) If you think the vaccum lines are correct then you may have a reassembly issue with the Heater/ac box. I had the same problem with my 2000 Dodge Ram 4x4. Use the KISS rule "keep it simple stupid" start with the vaccum lines and all your wiring to the motors, make sure everything is plugged in. Hopefully you'll find it there before going back into the box again.

Posted on May 05, 2009

  • 323 Answers

SOURCE: heating / air conditioning control stuck to front defrost vents

There is a vacuum leak under the hood. Find the vacuum line on the passenger side where it comes through the firewall and follow it to the engine. You system needs vacuum to operate and without it the default setting is on defrost for safety reasons.

Posted on Jun 19, 2009

dttech
  • 4803 Answers

SOURCE: I have a 2002 Dodge Ram where vent selection won't change

Your heating and air conditioning system is controlled by the Body Control Module (BCM). Any diagnosis should begin with scanning the (BCM) for trouble codes to determine the source of the problem and/or which circuits and components are involved.

If a failed mode door actuator is, in fact the problem, the instrument panel must be removed to gain access to it.

Posted on Oct 17, 2009

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