The blower is responsible for circulating hot or cool air through your 2005 Chevy. This system uses four main components: fan switch, blower motor resistor, blower motor and blower motor wheel. If any of these components fails, the system will not operate properly.
The switch is the user interface for the system and it contains an electronic control. When this switch goes bad, the proper signal does not reach the motor and it will not work at all or only work at certain speeds.
The blower motor resistor is responsible for limiting the amount of electricity that reaches the blower motor. Typically when this fails, the blower will only work on its highest speed setting.
The blower motor wheel is the component that creates the air flow. When this component fails, there will be no air flow at all. Prior to the wheel failing, it typically makes a buzzing or rattling noise.
The blower motor is an electric motor that spins the wheel to create the air flow. Just as the blower motor wheel, when this component fails, there will be no air flow.
