What does a blower motor resistor do

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What Does a Blower Motor Resistor Do? Key words: Blower motor, blower motor resistor, blower motor resistor repair, blower motor resistor replace.

Definition "Blower motor" refers to an electrically operated fan in a vehicle that supplies air to the passenger compartment. The heater blower resistor helps control the rate at which the blower motor supplies this air. A blower motor resistor, typically located beneath the passenger side dashboard, contains three resistors, or sets of terminals designed to generate voltage in proportion to electrical current. These resistors allow the blower motor to function at lower speeds.

Function Blower motor resistors contain controls that determine air settings. If the airflow exceeds a predetermined amount, the blower motor resistor reduces airflow through the vents via wire coils. Each coil is responsible for one speed setting: Thinner coils correspond to higher air settings and offer the least resistance (the least opposition to the flow of electric current), allowing the blower fan to rotate faster, while thicker coils correspond to lower air settings and force the fan to rotate more slowly.

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