Quick Answer: When should I replace my blower motor resistor

It should read at 4 to 5 ohms if it’s working properly. If it gives another reading, such as an open circuit, it means that the resistor has failed and needs to be replaced. It’s possible that a blower motor resistor will fail because the blower motor itself has a problem.

Can you drive without a blower motor resistor?

Your car’s blower motor is not only necessary for the operation of your air conditioner. Without a functioning blower motor your engine runs the risk of overheating. … Power to the blower motor is fed through the blower motor resistor, so if it fails or has any issues power can be cut off to the motor.

How much does it cost to replace a blower motor resistor?

Blower Motor Resistor Replacement Cost – RepairPal Estimate. The average cost for blower motor resistor replacement is between $115 and $141. Labor costs are estimated between $47 and $59 while parts are priced between $68 and $82. This range does not include taxes and fees, and does not factor in your unique location.

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

takes about 45 minutes.

What causes a blower motor resistor to go out?

In most cases, a blower motor resistor fails due to corrosion or overheating. Sometimes, the mechanical resistance to the motor rotation causes an excessive electric current that can overheat and prematurely damage the blower motor resistor.

What happens when your blower motor resistor goes bad?

If you have faulty blower motor resistor you may experience low airflow coming from the vents even when the fan is all the way on high. In some cases bad blower motor resistor may not even turn the blower motor fan as a result your fan will not work at all and there will be no air coming from the vents.

How much does it cost to fix 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.

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).

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.

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

What are the symptoms of a bad blower motor resistor?

  1. No Air. …
  2. High speeds only. …
  3. Low speed only. …
  4. Fan won’t turn off. …
  5. Blower motor works on some settings but not others. …
  6. Smoking vents. …
  7. Burning smell.

29 апр. 2020 г.

How do you know if your blower motor is bad?

Signs That Your Car’s Blower Motor Is Going Bad

  1. Weak airflow. This is one of the first signs of a bad blower motor that people tend to notice. …
  2. Noises. Have you noticed any unusual noises coming from your vehicle’s HVAC system? …
  3. Smoke or smells. In some cases, you may even notice smoke or smells of burning while driving, in which case you should pull over immediately.

How long should a car blower motor last?

The bearings of the blower motor can also lose their initial lubrication and begin to dry out, causing increased friction in the motor. The blower motor in your home or office should last anywhere from 10 to 20 years. Modern sealed bearings and sealed bushings can push the lifespan to its maximum of 20 years.

Can I bypass blower resistor?

In the highest speed state, the blower resistor is bypassed completely and the fan is connected directly to the car’s battery, which allows maximum current through the motor. … A blower motor resistor or a blower motor control module is the part that controls the speed of the blower motor.

Why is my blower motor not working?

In a situation where the motor doesn’t work on any speed, the most likely causes are: a blown power supply fuse, a bad motor ground connection, bad motor speed control module or a failed motor. On all systems, a failed blower motor is least likely. … Start by checking the blower fuse and HVAC controller fuse.

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What does a bad blower motor sound like?

You might hear this as a noise coming from directly behind the vent, perhaps a light slapping, or a sudden pop before you notice a problem with airflow. Whirring noises might also result from a bad bearing in the motor. … This is a telltale sign of a bad blower motor.

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