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Q: Heater vent. on 2003 Hyundai Elantra

The heater will not blow air through the floor vents. The blower works fine in all settings, but the vent damper motor will only move to defrost or face. When floor is selected face is opened.
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Your Elantra has small electric motors that control the airflow to all the different dashboard vents. These motors are controlled by the A/C Control Panel, so there may be an issue with the A/C panel, electrical wiring or one of the motors themselves. A shop should check for any diagnostic trouble codes and diagnose accordingly, and also have them check for any technical service bulletins from Hyundai related to this issue.
Good Luck, let us know what you find out.
Thank you for your response. The motor, actuators and door/damper all move freely, so I am certain there is something disrupting or preventing the signal to stop at the floor position. I will read the codes and go from there.
I did find a solution. I had to remove and disassemble the heater control panel. I fond the rotary switch that contols the position of the damper doors to be faulty. I went so far as to take the switch apart and straighten out the copper spring brushes so that they would make contact with their associated circuit foils. This was not a difficult task if you are adept at working on very small and fragile parts. It may be easier to locate a contol box and r&r the whole thing.
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