Question about 2001 Dodge Durango

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Heater switch not working

No airs blowing from defrost

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  • Dodge Master
  • 3,103 Answers

Check a/c fuse

Posted on Jan 01, 2014

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 7 Answers

SOURCE: when i have the heater/defroster on the heater

It sounds like you have a blend air door stuck. This is in the housing of the heater a/c blower unit under the passenger side of the dash. There is a motor on the top of the housing that could possibly be stuck or on working.

Posted on Sep 05, 2009

  • 217 Answers

SOURCE: 2002 Dodge Ram pickup heater and defroster blows

sounds like it could be a mode door actuator problem which directs the flow of air in the heater case,

Posted on Mar 21, 2010

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1 Answer

1997 Ford Taurus front defrost not working


. Air won't blow out of the floor or center vents just defrost ? Do you have manual or automatic climate control ?
Air Flow Control
Air flow control is accomplished in the following manner:
  • Primary control is through the function selector knob mounted on the A/C-heater function selector switch, which is part of the integrated control panel.
  • The function selector knob has the following positions: OFF, MAX A/C, A/C, PANEL, PANEL/FLOOR, FLOOR, FLOOR/DEFROST and DEFROST. The A/C-heater function selector switch combines a vacuum selector valve with an internal electrical switch.
  • The vacuum selector valve directs source vacuum to various vacuum control motors (18A318). Refer to the Vacuum Control Diagram , System Airflow Schematics and Vacuum Control Chart .
  • Two internal, single-pole electrical switches are also controlled by the A/C-heater function selector switch. The combination of these electrical switches controls the electrical supply to the A/C clutch and heater blower motor switch (18578).
  • The position of the function selector knob determines the manner in which the system will operate.
  • Each position of the function selector knob is detented for positive engagement.
  • Vacuum Control Motors The vacuum control motors (18A318):
    • are located on the A/C evaporator housing, A/C recirculation air duct and heater air plenum chamber (18471).
    • direct system airflow to the vehicle interior as determined by the remote climate control module or manual override.
    • The five-passenger seating configuration has an additional vacuum control motor mounted on the heater air plenum chamber to control airflow to the rear seat A/C register (19893).


vacuum control motor-i4bq0ig33y1522pr2d2rrkk3-2-0.gif

Jul 09, 2017 | Ford Cars & Trucks

2 Answers

A/C will only blow through defrost vents


Common question on this site. On late model cars, the vents are controlled by blend door motors. Small electric motors open and close doors to direct air flow.
Chances are you have a blend door that is stuck or a failed motor.
The default position is the defrost to make sure the windshield is always clear.
Someone will need to look behind the dash to see if all of the doors will move on demand.

Jun 27, 2012 | 2006 Acura TSX

1 Answer

The air only blows out only on defrost on my 91 chevy truck


air blows out only defrost possible cause could be faulty ac and heater mode switch or broken vacuum line to ac and heater vacuum actuator.you have to remove ac and heater control switch to check it out.

Dec 05, 2011 | 1991 Chevrolet C1500

1 Answer

Air works great but no heat just blows cold air


For this types of problem,i suggest you to check this help links:----Car heater blowing warm, but not hot air?http://schematicsdiagram.blogspot.com/2011/12/car-heater-blowing-warm-but-not-hot-air.html
---------A/C, heater, defroster fan, not working?http://technoanswers.blogspot.in/2012/02/ac-heater-defroster-fan-not-working.html
--------Heater problem?http://technoanswers.blogspot.in/2012/02/heater-problem-on-isuzu-trooper.html
---------Engine Overheats and heater blowing cold?http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html
-----------Heat blows cold on drivers side and hot on passenger side?http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html----------------This will help.Thanks.

Sep 05, 2011 | 2007 Suzuki SX4

1 Answer

I have a 1996 cherokee country. When I use y


Could be the control switch itself. Or possibly the actuator that moves the door from defrost to heater. With the heater on, try switching from defrost to heat and try to hear if you can hear anything in the dash operating.

Mar 09, 2010 | 1995 Jeep Cherokee

1 Answer

On my sons 2000 chevy silverado 4.8 liter....the heater works fine....but when i switch control to defrost....only cold air blows out defrost vents....any help would be appreciated.


the heater & defroster baffles are controlled by electic motors that open and close the baffle (doors) to let the air to the heater and defroster vents. the motor must be bad

Jan 12, 2010 | 2001 Chevrolet Silverado

1 Answer

I have a dodge 600. when the heater is switched to defrost no air


check for any vaccum leaks, hoses leaking or unhooked, also may have a bad blend door motor. see if all other positions work like floor, vents, fresh air and recycle air. good luck.

Oct 14, 2009 | 1988 Dodge 600

1 Answer

1991 chevy g20. 5.7l v8. air conditioning does not work. the blower and switches seem to work fine but it does not cool and only blows out of defrosters.


Blowing out of the defrost is a vacuum problem. You have a leak between the motor and the heater controls. Most likely needs to have the A/C system charged up.

May 29, 2009 | 1992 Chevrolet G20

2 Answers

When i have the heater/defroster on the heater below blows cold air while the defrost blows hot. when i switch to just defrost the bottom heater stays on and blows cold air. when i have front dash and...


It sounds like you have a blend air door stuck. This is in the housing of the heater a/c blower unit under the passenger side of the dash. There is a motor on the top of the housing that could possibly be stuck or on working.

May 10, 2009 | 2003 Dodge Durango

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