Ac Heater Blower Motor Fan Speed Control Resistor

An a c blower motor resistor uses resistance to control the speed of the blower motor.

Ac heater blower motor fan speed control resistor.

When fan speed is changed via the knob on the instrument cluster the blower motor resistor changes setting which changes the speed of the blower motor. What are the symptoms of a bad blower motor resistor. 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. Since the blower motor and resistor are working almost constantly it can wear out over time.

Hvac blower motor fan resistor ac heater relay replaces 973 020 68004241aa 5012212aa 4720278 compatible with chrysler dodge jeep vehicles ram 1500 2500 concorde grand cherokee 4 5 out of 5 stars 212. Every time you fiddle with the fan speed of your car s air conditioning or heating system you change the current that flows through the blower motor resistor on the way to the blower motor. Blower motor resistor testing. Function controls the fan speed in your ac and heating system restores heating and cooling system to original peak performance if you can no longer adjust the air speed with your ac controls or your air conditioner system no longer blows that means you need a new blower motor resistor.

Your vehicle s blower motor resistor controls the speed of your blower motor. Find many great new used options and get the best deals for ac heater blower motor fan speed control resistor for chevy silverado 1500 at the best online prices at ebay. Free shipping for many products. The blower motor resistor controls the blower motor s fan speed and ensures that the right amount of power reaches the motor.

The blower motor resistor is an electrical component that is a part of the vehicle s heating and air conditioning system. 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. Many blower resistors control current to the blower motor in all speeds except high.