Question about 2003 Chevrolet TrailBlazer

2 Answers

A/c fan only blows to floor will not adjust to dash vents

Changed out battery and ever since a/c fan will not blow from dash vents - only to floor. is it coincidence or somehow connected to battery change out??

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  • billie ramos
    billie ramos May 11, 2010

    i doubt that the battery had enough charge to fry your vent actuators.......maybe they just gave up........."have you checked the actuators?

  • its420_us May 11, 2010

    Your vent controls are operated by vacuum. Is it possible you accidentially disconnected a vaccuum line somewhere?

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  • Master
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As long as you did'nt connect the battery terminals backwards or left the ignition key on during battery install, I don't see how it could be the cause of the issue. GM uses servo's to actuate each vent. Do you have knobs or a bush-button controller, in your vehicle?

Posted on May 14, 2009

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  • Master
  • 253 Answers

Under the back seat on the drivers side is a fuse panel. Fold the seat forward, remove the fuse block cover, and locate the HVAC fuses.They are 10 amp fuses, remove the fuses and let set for 5 min or so. Reinstall the fuses, start the vehicle and the A/C system should do a relearn. It will take1 minute to do so do not touch any controls for at least 1 min. This should help. Good Luck

Posted on May 14, 2009

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