Why Does My Blower Motor Resistor Keeps Melting


Should a blower motor resistor get hot?

Many blower motor resistors are designed such that they would burn up if they are not in the path of the air from the blower fan. They are that close to tolerance. Not because manufacturers like to burn stuff up but higher wattage resistors get very big and very expensive..... even those will get hot. via

How do I know if my blower motor resistor is bad?

  • Fan does not work at all, so no air comes out of the vents.
  • Fan only works on some speeds and not others.
  • Fan only works on the highest speed.
  • Fan runs all the time and can't be controlled with the fan switch.
  • You see smoke coming out of the vents.
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    Can a blower motor resistor be intermittent?

    Intermittent Operation

    When the resister of the blower motor starts to fail, the motor operates only intermittently. The higher current can make the jump across the resistor contacts that are going bad and get the blower motor to engage. via

    Can you fix a blower motor resistor?

    The resistor module is easy and inexpensive to replace. It's then typically installed in the ductwork, near the car blower—either under the dash or under the hood. (Refer to a service manual to locate yours.) Purchase a new resistor module at the auto parts store (usually less than $25). via

    What happens when blower motor resistor goes bad?

    If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed. The heating and air conditioning systems may still function at one speed, however the resistor will have to be replaced in order for full functionality to be restored. via

    What are the signs of a bad blower motor?

    5 Signs Your Blower Motor Needs to Be Replaced

  • Weak Airflow from the Vents. This is usually the first indication that you may have a faulty blower motor.
  • No Airflow at All.
  • Unusually High Energy Bills.
  • Strange Sounds.
  • Overheating.
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    How much does it cost to replace a blower motor resistor?

    The average cost for a Blower Motor Resistor Replacement is between $108 and $137 but can vary from car to car. via

    How do you troubleshoot a blower motor? (video)

    How do you test a blower motor? (video)

    How do you test a blower motor resistor?

    Place one lead of the Ohmmeter on terminal 1 of the resistor. Place the other lead on terminal 2 and check against specifications. If this circuit is open, showing infinity on the Ohmmeter, the blower resistor must be replaced. Move the lead from terminal 2 to terminal 3 and check this reading against specifications. via

    How much does it cost to replace a blower motor?

    Cost to Replace Central or Forced Air Blower Motor

    Replacing a blower motor costs $450 on average with a typical range of $250 to $800. With a warranty, you might pay as little as $150 for labor alone. For high-end models, like those with large motors or access issues, you might pay as much as $2,000. via

    What makes a blower motor go bad?

    The blower motor may seem to be to blame when air flow becomes notably decreased, when if fact, the fault lies elsewhere. Insufficient flow at all blower speeds might be caused by a clogged air intake screen. Leaves, or other debris that obstruct the screen can make the blower motor efforts seem feeble, at best. via

    How long does it take to replace a blower motor resistor?

    takes about 45 minutes. via

    How do you fix a blower motor resistor?

  • Remove the negative battery terminal.
  • Locate the blower motor resistor on the passenger side under the dash board.
  • Disconnect the electrical connector to the blower motor resistor.
  • Remove the screws or bolts to the blower motor resistor and remove the resistor.
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    How do I reset my blower motor?

  • Step 1: Turn off the power to the furnace.
  • Step 2: Remove the blower compartment cover.
  • Step 3: Make sure the blower is completely cooled off.
  • Step 4: Locate the reset button.
  • Step 5: Press the button in (assuming that this is your issue and that the button has popped).
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