What Is The Blower Motor Resistor

- March 13, 2019

The blower motor resistor also commonly referred to as an ac blower motor resistor or a heater blower motor resistor is an important component to your vehicles heating ventilation air conditioning hvac system. These resistors allow the blower motor to function at lower speeds.

Symptoms Of A Bad Blower Fan Motor Resistor

Hvac Blower Motor Resistor

A blower motor resistor is a simple electric resistor.

What is the blower motor resistor. This electric component is used to regulate a vehicles air conditioning system it is the part that controls the blower motors fan speed according to the settings which can be changed by using the knob and turning it left or right which would increase. The fan speed can be changed either by switching the blower resistor resistance mechanically using a rotating lever or electronically by the air conditioning system. It is responsible for controlling the blower motors fan speed.

While a blower motor is what actually forces the hot or cold air. When you turn a knob to produce more air flow for heat or cool air the resistor adjusts the electrical resistance to control the power sent to your blower motor. Blower resistors are resistors which are used to control the fan speed of automotive blowers.

Its used in cars where the blower motor has only 4 or 5 fixed speeds as on the left side in this diagram. A blower motor resistor is an adjustable resistor. When fan speed is changed via the knob on the instrument cluster the blower motor resistor changes.

See the photo of a ford blower motor resistor. 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. Since the blower motor and resistor are working almost constantly it can wear out over time.

When fan speed is changed via the knob on the instrument cluster the blower motor resistor changes. It is responsible for controlling the blower motors fan speed. Your vehicles blower motor resistor controls the speed of your blower motor.

The blower motor resistor is an electrical component that is a part of the vehicles heating and air conditioning system. The blower motor resistor is an electrical component that is a part of the vehicles heating and air conditioning system.