HVAC Blower Motor Resistors

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HVAC Blower Motor Resistors

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What is a HVAC Blower Motor Resistor?

A HVAC blower motor resistor is an electrical component that reduces the current flowing to the blower motor in order to control the speed of the fan.

What is the purpose of a HVAC Blower Motor Resistor?

The purpose of a HVAC blower motor resistor is to regulate the speed of the fan. It does this by reducing the current flowing to the blower motor.

How can I determine if my HVAC Blower Motor Resistor is faulty?

If your HVAC blower motor resistor is faulty, you may notice the fan is running at full speed or not at all. You can also check your vehicle's service manual for diagnostic tests to determine if the resistor is faulty.

Can a faulty HVAC Blower Motor Resistor cause damage?

Yes, a faulty HVAC blower motor resistor can cause damage to your vehicle's electrical system.

How do I replace a HVAC Blower Motor Resistor?

To replace a HVAC blower motor resistor, you will need to:

  1. Disconnect the negative battery cable.
  2. Remove the HVAC blower fan assembly.
  3. Unplug the electrical connector from the HVAC blower motor resistor.
  4. Remove the mounting screws from the HVAC blower motor resistor.
  5. Install the new HVAC blower motor resistor and reconnect the electrical connector.
  6. Re-install the HVAC blower fan assembly.
  7. Reconnect the negative battery cable.