Having problems with your 2003 Chevrolet Monte Carlo ?
Dual climate control doesn't work properly on 2003 mc.driverside hot air only regarless of setting, passenger side woks as should, this is with the a/c on.
Sounds like the temperature door control actuator needs to be replaced on the driver's side.
Repair Help & Product Troubleshooting for 2003 Chevrolet Monte Carlo
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