Question about 2005 Jeep Liberty

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Blower control only works on high

The blower control for the a/c & heater only works on the number four high level, one, two & three don't work.

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  • klmpro Jan 28, 2009

    My friend an mechanic said that is the resistor unit mounted to the firewall in the engine compartment. I checked with a national auto parts chain in town, $13.99 ordered it and expect to make the repair myself.

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  • Jeep Master
  • 6,982 Answers

Either the switch, relay or blower resistor has failed. I would check resistor and relay first. The resistor is a flat usually brown item attached by two screws to the blower box, usually fairly close to the blower fan. the relay is usually just upstream from there. Unless the switch feels sloppy, it's probably OK. If you can't locate these items, get a manual. It will help you with this and lots of other stuff!!
Good Luck!!

Posted on Dec 29, 2008

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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.
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    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:
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  • Three resistor elements are mounted on the resistor board to provide four blower motor speeds.
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  • 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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it is behind the glove box I think. It is in the plenum case where air blowing on it keeps it cool.

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Please rate as solved problem if this is what you needed.

------------------------------------------------------------------------------
Manual Climate Control System Outputs
Blower Motor Switch Resistor
Blower Motor Resistor Coils 9ba1105.gif Blower Motor Thermal Limiter 47afe58.gif The heater blower motor switch resistor has the following features:
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