2004 Hyundai Sonata: Blower Fan only works on High Mode?

There are 4 modes of setting for blower motor on Hyundai sonata .if the fan is only working on high mode and not on other modes then this problem with motor controlling resistor.

When the Blower Motor will only work on the highest setting, this is most commonly a problem with the Blower Motor Resistor. Carefully inspect the electrical connector for any loose, broken or melted wires. If the visual inspection check ok, suspect a faulty Resistor.
The blower motor resistor is  mounted to the HVAC system, above the blower motor. Best access is through the glove box.

See the help diagram shown below:----


This details will help.
Thanks.

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