Question about 1993 Jeep Grand Cherokee

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The Heater selector won't change from defrost to any other settings like floor heat or straight from the dash . the switch on the dash moves but the heat only comes from the defrost vents in the dashboard

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  • 105 Answers

Hello, sounds like the cable broke or, lots of newer veichels use air lines, any way possible, check and see if air lines are still hooked up to the back of the heater controls, should be 4or 5 air lines together, all hook on one place behind heater controlls

Posted on Feb 06, 2010

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1 Answer

I have a 2011 Dodge Avenger and when I put the heat on floor it blows cold? The heat works on dash and on defrost just don't blow hot in floor.


Damper-door not moving. Check for obstruction under dashboard passenger-side toward middle of car. Pinched, leaking or disconnected vacuum-hose. Check manifold behind selector-switch for same-thing.

Feb 19, 2015 | Dodge Cars & Trucks

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'99 olsmobile heating and ac


You have a problem most likely with the air temerature control blend door actyautor or the door is jammed or in most cases both. Repair requires the dash to be removed so have it properly diagnosed as the repair is well over $1000.00

May 07, 2013 | Cars & Trucks

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2002 Chevy S10 blows warm air on all settings unless it is set for the vents I replaced the thermostat as had code for bad thermostat


You may have a problem with the blend door motors on the side of the heater box. As one other person said: "Look at the controls right above the driver's feet area toward the heater box". If they are moving properly all the way, when you move the selectors on the dash, then there may be a problem inside the heater box. If they don't move all the way, then the blend door motors may be bad or binding. Another common problem on these is the control head on the dash not working properly. The control head can be diagnosed with a scanner that can read codes for it. Hope this helps out.

Oct 28, 2012 | 2002 Chevrolet S-10

1 Answer

Can't switch interior heat from dash to defrost on 2001 montana


The problem will be on the other side under and just to the right of the steering column. This is kind of a pain to repair. Pull the lower cover off from under the steering column. Watch the lever on the hvac case move as you click the position switch to defrost and back. It most likely is hanging up and not moving into defrost position. Reach up there and just move the lever or arm a little and it will probably finish it's movement. The arm has worn to a point where it has a little slot in it that is preventing or stopping the movement.
I have repaired this but you gotta watch it several times. The lever is spring loaded so you need to watch closely or you won't get it back together right.
I got the thing out and smoothed the worn place where the lever started working again. It's not real easy to get out so be careful. Can't really tell you anymore than that.

Nov 20, 2011 | 2001 Pontiac Montana

1 Answer

MY DISTRABUTION DIAL FOR DEF.,VENT, ETC IS IN DEFROST AND WON'T CHANGE. THE DIAL TURNS BUT NOTHING CHANGES. I NEEN SOME ADVICE ON WHAT TO DO TO FIND PROBLEM AND FIX. THANKS GENO


Here is the info. I hope the pictures show up. please rate assistance. thx.

Air distribution within the vehicle is determined by the function selector switch position. Two airflow mode doors are used to direct airflow within the heater core and evaporator core housing. The function selector switch/cable assembly is used to position these airflow mode doors. Refer to Section 412-00 for description and operation of each of the system functions.
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Function Selector Cable Assembly
The function selector cable assembly moves the airflow mode doors to the desired position using a 2-sided pull-pull type cable assembly. The function selector controls the cable movement. The end of the cable assembly attaches to the airflow mode door/temperature blend door actuating assembly which transfers the cable movement to the 2 airflow mode doors.
An electrical switch is incorporated into the function selector to notify the A/C switch assembly if DEFROST or FLOOR/DEFROST is selected. When DEFROST or FLOOR/DEFROST is selected, the A/C switch assembly will disable the RECIRC request button and send an A/C request to the powertrain control module (PCM) regardless of the A/C request button indicator ON/OFF status.
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SECTION 412-01: Climate Control 2005 Focus Workshop Manual REMOVAL AND INSTALLATION Procedure revision date: 02/25/2004
Function Selector Switch adobe.gif Printable View (173 KB) Removal and Installation
  1. Remove the 4 bolts and position aside the lower steering column cover.
    a0093241.jpg
  1. Remove the function selector knob.
  1. Remove the center instrument panel finish panel.
    • Disconnect the cigar lighter electrical connector.
    a0093247.jpg
  1. Detach the function selector switch.
    1. Disconnect the electrical connector.
    1. Remove the screw and detach the function selector switch.
    n0037059.jpg
  1. Detach the function selector cable and remove the function selector switch/cable assembly.
    e0000109.jpg
  1. To install, reverse the removal procedure.

Aug 04, 2011 | 2005 Ford Focus

1 Answer

Selector switch will not change for defrost, floor, or panel no matter what the dial is set on. Checked the gates behind the dash and they all seem to move. any ideas?


remove the selector knob and look for a crack in the sleeve that slides down on the switch it is known to be a problem this vehicle has electric blend door actuators when you change dial do you hear a clicking sound if so the gears are stripped in one of the actuators if not while you have knob off of the selector switch take a pair of needle nose pliers and turn switch if it changes it,s the knob if not then could be the selector switch

May 21, 2010 | 2004 Ford Explorer

1 Answer

Ford Windstar SE, 3.8L V6, 1999, front seat heat/defrost is cold


the blendor actuators strip out the gear inside the actuator cases on these all the time. replace the actuator.

Mar 10, 2009 | 1997 Ford Windstar

2 Answers

Heater control 98 chevy s10 blazer


These trucks have a problem where moisture builds up in the heater box then freezes. When this freezes and you change your heater settings it breaks the shaft for the blend door. If this is what happened you should be able to look under the dash above and to the right of the gas pedal and you will see two vaccuum accuators one of them you should be able to wiggle around the linkage if it is broke. To fix this you need to remove the entire dash to get the heater box out which involves discharging the AC and draining the coolant because the heater core and evaporator come out. Please rate.

Dec 13, 2008 | 1996 Chevrolet Blazer

1 Answer

Heater vent doesn't shift to all positions


Sounds like you have a vacuum leak, those controls are are accuated by vacuum.

Dec 02, 2008 | 1995 Jeep Grand Cherokee

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