2005 Buick terrazzo blow heat on left side but not on the right side

ID Status Date Year Make Model Transmission Type A/C Controls Public/Private
#14909 Closed 2005 Buick Terraza public

How to recalibrate Buick terraza


Important:  Do not adjust any controls on the HVAC control module while the HVAC control module is self-calibrating. If interrupted, improper HVAC performance will result. The actual recalibration begins after step 7.

Alternate Method (w/o Scan Tool)

  1. Place the ignition switch to the OFF position.
  2. Connect any previously disconnected components.
  3. With the Mode knob in the PANEL position, press and hold the AC button for 5 seconds.
  4. Rotate the Mode knob fully counterclockwise.
  5. Rotate the Mode knob fully clockwise.
  6. Rotate the Mode knob fully counterclockwise.
  7. Release the AC button.
  8. Wait 40 seconds for the HVAC control module to self-calibrate.
  9. Start the engine and check HVAC operation.

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