Question about 1998 Dodge Ram 2500 2WD

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Heat only coming out defrost on window.

My heat works great. When I try to turn the dial so that I get heat out the foot vent or dash vent it doesn't do anything. I blows out the defrost, (windshield vent) all the time.

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  • m_j_wittman Jan 09, 2009

    pull out what panel?

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The blower gate is not opening to allow heat to other ducts under the dash. Its either mechanical or vacuum controlled from the knob on the dash. Look for a loose vauum pipe (usually brightly colored ones) under the passenger side footwell, allso chck to see if any actuator arms have dislodged.

Posted on Jan 09, 2009

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That means that the airflow control is broken or stuck.

You need to access to the airflow control to replace it or fix it.

The best way to do the fix is following the step by step instructions on the haynes manual, get it.

See also : — Yahoo! Auto

Posted on Jan 10, 2009

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The vents are run on vacuum... look under the dash for the vacuum hoses and also listen for a vacuum leak... if none there... look under the hood near the fire wall (beside the brake booster) for a white cannistor (small like a film cannistor) check that the vacuum hoses are hooked to it. it may require replacement as well.

Robert

Posted on Jan 09, 2009

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I recently had this same problem it was the blower motor as well as a heater valve on the back of the block.

Posted on Jan 09, 2009

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Check out this  Blown blower motor fuse--------Bad blower motor------Badblower motor resistor------------Blower Relay. its  possibly the heater coil (air side) is clogged. I noticed that the heater coil is below the AC coil so it is possible that debris is down in it. I may try to pull it and clean it. Have you tried that

Posted on Jan 09, 2009

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Check for a vacuum leak either under the hood or under the dash
Check the operation of the vacuum actuated motors under the dash
Check the operation of the selector switch
Defrost is the default setting for this system

Posted on Jan 09, 2009

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Either the cable to the blend door has broken or the knob assy is stripped. Pull out the panel to gain access to the back of the knob.

Posted on Jan 09, 2009

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