Question about 2004 Jeep Grand Cherokee

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Heater/ a/c blower

Last year one of the flapper doors in the heater box became inop. Dealer pulle everything out replaced the door. Then the blower did not work. Finally picked it up worked fine(heater/ac). I have heat this year but no blower. Can you tell me which fuse # is for the blower? Also what else can I do before taking it in? Thank you so much!

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There is a 30 amp fuse for the blower. The blower motor resistor could be bad.

Posted on Nov 21, 2008

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I priced this job at a dealer and it came in for around $300!

This is a really simple repair, a great choice for the do-it-yourselfer.
Here are the steps/procedures for doing this repair yourself in about 30 minutes:

  • Tools to do the job:
    • Ford radio removal tools
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    • Flashlight
    • Small hands or band-aids

  • Remove the radio -

    • Insert the U-shaped 'handles' into the vertical pair of holes on each side of the front of the radio until you feel it hit an indent / click .

    • With both tools inserted, push outward on the top of the tools while pulling the radio out & away from the dash.

    • Disconnect the 2 wire harness connectors & the antenna.

  • (Optional) Remove A/C & Radio control dash panel
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  • Loosen and remove two screws revealed just above radio when radio was removed.

  • Loosen and remove two screws inside (one on each side) the drink holder & ash tray drawer.

  • Gently pull the loosened section of the dash panel forward.

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  • You might want a helper to hold the panel off to the right while you work.

  • Reassembly is exactly reverse.


  • Remove / replace the blend door actuator -

    • Looking in through the radio opening, locate the actuator module - a white plastic unit about the size of a pack of cigarettes.

    • Use the nut-driver to remove the three 5/16ths mounting screws.

    • Disconnect the wiring harness located on the side

    • Reverse steps to re-install
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  • Reassemble the dash panel.
  • Reinstall the radio (watch that no cables bind during the reinstallation.
  • What the actuator is / does:
  • Inside this unit is a circuit board, motor and small plastic round gears. The gears then rotate the actuator, which in turn opens and closes the damper allowing the air to pass through the heater core.

  • What happens is some of the little teeth break off creating a gap on the gear wheel. This gap prevents the gears from driving the actuator shaft.

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