Question about 2000 Jeep Cherokee

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2000 cherokee sport blower motor control

Interior fan- "blower" works only at high speed and off, replaced a/c heater control assembly- problem remains. Haynes manual wiring diagram shows resistors for fan speed in the "HVAC unit". what and where is that and could that be the problem?

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  • ammobeeman
    ammobeeman Nov 10, 2008

    Blower fan does not work. Switch does not turn on fan in Low, Med or High position. Only getting power to the panel lights. No power to the other wires in the connector. Checked all fuses-all good. Don't know how to check relays...

  • e5_Portland Nov 29, 2008

    exact same problem. blower only works on high. there was a real faint whining on speed 2 for a while. then it stopped working. used speed 3 for a few months then it stopped working. high is all I have left.

  • Anonymous Mar 14, 2014

    2002 town&country rear heater motor runs only on high neither front or rear control affect speed of fan

  • Anonymous Mar 15, 2014

    heater blower motor speed control does not work

  • Anonymous Mar 19, 2014

    HAVE REPLACED RESISTOR TWICE

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  • 73 Answers

It is a bad blower motor resistor and it is mounted on the bottom of the A/C heater housing on the passenger side of the vehicle under the glovebox area. Hope this helps. Please rate this a fixya if it helps. Thanks.

Mike

Posted on Sep 13, 2008

  • Durand Crawford
    Durand Crawford Jan 23, 2014

    2006 Jeep wrangler x replaced fan motor resistor, console switches and fan motor resistor burned out in 1 min.

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1 Answer

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When the blower fan will only work on high speed setting this means the fans speed control resistor is burned out, when it fails the fan defaults to high speed only. The fan resistor is located next to the fan and held into the cooling air duct by 2 screws near the blower motor. The part is fairly cheap and easy to replace.

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My 95 jeep cherokee heater switch on ly works on high


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Jan 30, 2010 | 1996 Jeep Grand Cherokee

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I have a 98 cherokee sport and the heaters do not warm up at all and if they do then it will take a few hours plus the blower only works on high speed (4).


The heat in your car comes from the heater core,it's a baby radiator under the dash,The coolant from the engine flows through it, So as the engine coolant gets hotter so does your heater core. If the coolant is not getting warm you might want to replace the thermostat,that will help alot.
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Blower motor doesn't blow anymore, This blows


If it blows only on high speed, it is the resister.
If it does not work at all, check fuses first. See owner manual for location.
Then check blower motor by jumping 12 volts from battery to blower motor. Make sure ground is jumped too.

If it works now, it's the control panel. If not, it is the motor.

Blower Motor —Front Removal and Installation
  1. Prepare the vehicle for blower motor (19805) removal.
    1. Disconnect the battery ground cable (14301). For additional information, refer to Section 414-01 .
    1. Remove the air cleaner assembly. For additional information, refer to Section 303-12 .
  1. Detach the speed control servo.
    1. Disconnect the electrical connector.
    1. Remove the bolt.
    1. Position the speed control servo aside.
  1. Position the coolant expansion tank/windshield washer reservoir aside.
    1. Remove the screws and the nuts.
    1. Position the coolant expansion tank/windshield washer reservoir aside.
  1. Remove the blower motor.
    1. Disconnect the vent hose.
    1. Disconnect the electrical connector.
    1. Remove the four screws.
    1. Remove the blower motor.
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Also,

Heater Blower Motor Switch Resistor(s)
The front heater blower motor switch resistor has the following features:
  • The assembly is located in the engine compartment on the evaporator housing (19850) next to the blower motor assembly (19805).
  • Three resistor elements are mounted on the resistor board to provide four blower motor speeds.
  • Depending on the heater blower motor switch position, series resistance is added or bypassed in the A/C blower motor circuit to decrease or increase A/C blower motor speed.
  • An overheating device (thermal limiter) will open the resistor coil circuit when the temperature reaches 121°C (250°F), interrupting the blower motor operation in all speeds except high.
  • The thermal limiter cannot be reset and is not serviceable.

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2000 jeep cherokee sport - a/c heat control fan stopped working - the blower resistor looked burned so I replaced it - no change - next I relaced the control module - no change - the two related fuses are...


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Interior fan won't run to run A/C or heater. I


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Jan 14, 2009 | 2005 Jeep Grand Cherokee

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