Blower resistor fails repeatedly?

In most cases, the blower fan resistor is failing either due to overheating or corrosion. If the blower fan fails, your car will not blow any forced air. However, sometimes the problem can be with the blower motor itself. This is especially apparent when you have replaced the blower fan multiple times.

  • Worn blower motor causes repeat blower motor resistor failure However, other factors can cause the blower motor resistor to fail prematurely. For example. as a blower motor ages and wears, it can draw more current—more current than the blower motor resistor was designed to handle. In that case, the blower motor resistor will fail repeatedly.

Why does my blower motor resistor keeps going bad?

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 causes heater resistors to burn out?

Trent, one of the biggest reasons for blower motor resistors to have shorten life is actually because of faulty blower motor drawing too many amps, some times melting wires/plugs, heating up resistors shortening their life.

Why does my blower motor relay keep blowing?

Blown fuses If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. Any sort of electrical spikes or excessive current from a bad relay will blow the fuse and cut power in order to protect the system.

Can a blower motor resistor work intermittently?

Reduced airflow is when the blower motor is trying to move air through the vents but the resistor isn’t sending enough power to move the air with much pressure. Depending on how much resistor is still functioning, the reduced airflow could be an intermittent problem.

Can a blower motor resistor be bypassed?

Blower resistors are made of several resistors with different resistances. 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.

Why does my blower motor only work on high?

Most car manufacturers use a series of resistors to make the heater blower motor run at different speeds. And when one or more of these resistors burn out, you’re usually left with only one heater blower motor speed—high. The resistor module is easy and inexpensive to replace.

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

The average cost to replace the blower motor resistor at a repair shop is between $44 and $55 in parts and $70 in labor costs, for a total cost of around $114 to $125.

Can you bypass a resistor?

All current will bypass the resistor and travel through the short. The voltage across the 100Ω resistor is going to be zero. The 100Ω resistor is not impacting the circuit.

What causes resistors to fail?

A fixed composition resistor normally fails in an open configuration when overheated or overly stressed due to shock or vibration. Excessive humidity may cause an increase in resistance. A variable composition resistor may wear after extensive use, and worn away particles may cause high resistance short circuits.

How do I know if my blower relay is bad?

If you have a faulty blower motor, you may experience low airflow from the vents, even when the fan is on high. There will be no air coming from the vents if your fan isn’t working due to a bad blower motor resistor.

How do you test a blower relay?

Connect a test light or multimeter to the ground (black lead). Turn the ignition key to the on position (engine off), and remove the relay. Using the probe, test all terminal sockets in the relay connector. Two of the four should have power.

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.

Why does my blower motor work sometimes?

When a blower resistor fails, the highest fan speed usually is the only one that still works because it essentially bypasses the resistor and receives the maximum amount of voltage. When the resistor is working, it reduces the amount of voltage going to the lower fan speeds so the fan runs slower.

How do you know if you have a bad blower motor resistor?

If the airflow from the vents is weak… If you try to increase the air pressure and you feel no difference in the pressure blowing, then your blower motor resistor may be failing. A damaged blower motor resistor will work on one fan speed which may not be enough to keep the inside of your car cool or warm enough.

Why does my blower motor only work on low?

It sounds like this may be a sign of a faulty blower motor or bad wiring between the motor and the resistor. The electrical contacts may also wear out causing the motor to fail. I would recommend having an expert from YourMechanic come to your location to diagnose and replace your blower motor.

Blower motor resistor keeps failing

Many automobile manufacturers use a blower motor resistor in combination with a multiple speed switch to offer three or four blower motor speeds. Blower motor wiring schematic The blower motor resistor is actually a collection of resistors that have been linked together in series. Take a look at the image below. The electricity is routed via all three resistors in order to run at the slowest possible pace. Power passes via one less resistor for every one increment in speed. According to certain automakers, electricity to the blower motor is routed through the fan speed switch first, then through the blower motor resistor, before being sent to the blower motor and ground.

More: Blower motor resistor keeps failing? (The answer is found)

What causes a blower motor resistor to fail

The fundamental essence of resistors is to obstruct the passage of electricity, similar to the function of a flow restrictor in a pipe. Resistors, on the other hand, create heat as a result of their ability to reduce current flow. Over time, the heat generated by the resistor might lead the resistor to fail on its own. Automobile manufacturers place the blower motor resistor in the heater duct so that it is exposed to cooling airflow, which reduces the probability of failure.

Worn blower motor causes repeat blower motor resistor failure

Other circumstances, on the other hand, might contribute to the early failure of the blower motor resistor. Take, for example, The wear and tear on a blower motor causes it to draw greater current, which exceeds the current capacity of the blower motor resistor. It is in this circumstance that the blower motor resistor will fail on a regular basis. The blower motor should be tested for amperage if you have replaced the blower motor resistor and it has failed to operate properly after that change.

High resistance in the electrical connector can cause repeat blower motor failure

Actually, corrosion or poor contact in the blower motor resistor connector is the cause of this problem. An overheating condition can also be caused by a faulty blower motor resistor. In some instances, the heat is so intense that the connector is completely melted. This is a common occurrence on late-model General Motors vehicles. It is not recommended that you attempt to repair a melted connector. Purchase an upgraded pigtail and splice it into the harness, along with a new blower motor resistor, to complete the installation process.

Water, leaves and debris in the airflow can cause blower motor resistor failure

The HVAC systems in automobiles are designed to minimize the likelihood of debris entering the system during operation. They are not, however, always successful. If water spray enters the system, it has the potential to quench the hot resistor wires, causing them to break and short out.

If you observe the loss of one blower motor speed or all speeds quickly after driving through rain, suspect water damage to the blower motor resistor. Rick Muscoplat has a new year’s resolution. Rick Muscoplat posted a blog entry on

Reasons Behind Blower Final Stage Fan Resistor Failure: Advice from Experts in Addison

BMW drivers are accustomed to receiving a comfortable and dependable driving experience from their premium car. When purchasing this vehicle, you can anticipate excellent performance along with all of the creature amenities all packaged into one stunning vehicle. Parts wear out and break on all automobiles, just as on any other machine. Your HVAC system is no different. Regular maintenance, servicing, and repairs are all part of the automobile ownership experience, and your HVAC system is no exception.

It is responsible for supplying electricity to the HVAC fan and blower.

You will also be unable to utilize your window defrosters at this time.

Causes of the Final Stage of Blower Fan Failure

BMW drivers are accustomed to receiving a comfortable and dependable ride in their premium car. Expect excellent performance as well as all of the creature pleasures in one stunning vehicle when you purchase this vehicle. Every automobile has parts that wear down and break over time, just like everyone else’s. When it comes to automobile ownership, routine maintenance, servicing, and repairs are all part of the deal, and your HVAC system is no exception. The blower final stage fan resistor may appear to be a difficult or expensive electronic component under the hood of your BMW, but it is actually a simple electrical device.

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If this component malfunctions or does not function properly, you will be unable to heat or cool your automobile.

Six Symptoms of Blower Final Stage Fan Failing

There are several signs and symptoms that indicate that your blower resistor may be malfunctioning. Consider the six probable indications listed below to determine if there are any that you have observed in your personal driving experience with your vehicle.

  • If you try to turn off your fan and it refuses to turn off no matter what you do, there is an issue with your final stage fan and you should contact the manufacturer for assistance. In this case, the blower resistor is not properly controlling the electric current, which is why the fan will not turn off. The fan will not turn on and there will be no air coming out: If you try to switch on the fan and nothing happens, you may also be experiencing a problem with it. Aside from the fact that it is not turning on at all, you may also notice an issue with airflow. For example, no matter how fast you turn up the fan speed, the airflow seems to be lesser than it was previously. A lack of proper regulation of the electrical current is indicated by this condition. It’s possible that the problem is caused by your blower fan resistor. Only at low speeds: Your fan is only operating at a low RPM setting. When you increase the speed of the fan, the fan will come to a complete halt. In some cases, this can occur depending on whether there is a wiring problem or an overall failure. However, because this is also a frequent indication of your HVAC blower malfunctioning, you will want the assistance of a repair to thoroughly identify the problem. Only at high speeds: It may appear to be alright if you keep the heating, cooling, and defrosting fans on high all of the time because it is a demand-driven appliance. In contrast, if you attempt to bring it down to lesser speeds, it may cease functioning. This appears to be odd since if it can run at high speeds, why wouldn’t it be able to operate at lower rates? This is a symptom indicating that the HVAC blower is working properly, but the source of the problem is the resistor. The fan is spinning at such a high speed that it does not require any additional modulation. So, if it only operates at a high speed, the fan resistor is the source of the problem. Bad Smells: You could get a whiff of something nasty. It may even have a burning scent to it if anything is burning. This occurs as a result of overheating in either the plastic or metal components. Smoking Vent: If smoke is flowing out of the vents, it is possible that the blower resistor is faulty, but it is more probable that the HVAC blower is at fault. If you see smoke or bad odors coming from your vents, you should pull over to a safe location and contact our experts for servicing and repair
  • Otherwise, continue driving.

Call The Pros at Ultimate Bimmer Service Today

At Ultimate Bimmer Service, the service specialists and mechanics look after the BMW vehicles of clients in Carrollton and Dallas, TX. If your BMW is displaying any of the symptoms listed on this page, please contact us immediately to schedule an appointment to bring your BMW in for service. We have a team of BMW Master Certified Technicians that have received official education and factory training and have a combined 30 years of expertise repairing and maintaining BMWs. We are ASE-certified, have factory diagnostic equipment, and only utilize genuine BMW parts and accessories, as well as original BMW parts and accessories.

Why does my blower motor resistor keeps melting?

Trent, one of the most common causes of shortened life in blower motor resistors is a malfunctioning blower motor that draws too many amps, melting wires and plugs in certain cases, and heating up resistors, causing them to fail sooner than they should have. After that, they purchase an aftermarket blower motor, which continues to burn. In many automobiles, problems with the blower motor resistor are prevalent. Blower motor resistor failure is most commonly shown when the heater fan only operates at the highest speed setting (4 or 5) and does not operate at lower speeds.

Is it normal for the blower motor resistor to become hot?

Although the majority of people are unaware of this, defrosting the windshield at a low or medium fan speed is more efficient due to the heat generated by the resistor.

Also, how can I determine whether or not my blower motor resistor is bad? Typically, a failed blower motor resistor will cause a number of indications that might alert the driver to the presence of a possible problem. What to Look for When Your Heater Blower Motor Resistor is Bad or Failing

  1. The blower motor is locked at a single speed. On some settings, the blower motor does not operate. There is no air coming from the vehicle’s vents.

What is the best way to tell whether a resistor is bad? Set the ‘ohms’ setting on a digital multimeter. Decide on an ohms range that is equal to or more than the value of the resistor that will be evaluated. Put your finger on one of the red leads from the meter and the other finger on the black lead from the meter. Because resistors do not have a polarity, it makes no difference which side of the resistor receives the red or black connection.

Blower Motor Resistor Problems

For example, if your automobile is experiencing problems with its blower motor resistor, it’s important to understand exactly what that item is, where it’s located, and why it could be causing you problems. We’ll go over precisely what the blower motor resistor is and some of the most typical issues that drivers have with this component in further detail. We’ll also go over what you can do to get it fixed as well as how much you can anticipate to pay to get the procedure done. Automobile repairs are EXTREMELY EXPENSIVE.

What is a blower motor resistor?

The reason why your automobile works when you switch on the heat or the air conditioning is that the air is forced into the cabin where you are sitting by a fan. The fact that it appears to be reasonably basic makes it one of the most readily taken for granted systems in your automobile. After all, a fan is a straightforward piece of technology in the eyes of the majority of people. Push the button until several metal blades begin to rotate, resulting in a gentle wind. I don’t think it’s too difficult to grasp the concept.

  • A blower motor is located behind the vents on your dashboard, and it is activated when the heat or air conditioning is required to function.
  • Due to the fact that it is placed within the car, you cannot see it, but that is where it is located.
  • By increasing the setting on your air conditioner’s control knob, the resistor instructs the blower motor to raise its speed and produce more air.
  • A dial is a type of electrical component that functions by transmitting electrical impulses that correspond to the information you provide by changing the dial.
  • As far as electrical systems are concerned, they are straightforward; yet, as you can see, if something prevents the flow of power, you may be in for a headache.
  • Furthermore, when the fan is turned up to its maximum setting in many cars, the motor resistor is completely bypassed because it is no longer required to regulate the flow of energy at that point in the vehicle.
  • Blower motor resistors are subject to a number of issues that can have a negative impact on their performance.
  • An overly corroded blower motor resistor is incapable of correctly regulating the current, and as a result, it will be unable to provide the right signals to the blower motor itself.

In the worst-case situation, it will not transmit any signal at all, and your fan will simply cease to function. If the resistor is not destroyed by corrosion, it might be damaged by another means such as being involved in an accident and the resistor breaks in some way.

What are the symptoms of a bad blower motor resistor?

When the blower motor resistor in your automobile fails, there are a few telltale signals that something is wrong. Sometimes the symptoms are similar to those of problems with other systems in your automobile, and you may want the assistance of a specialist to properly identify them. Among the most prevalent things to be on the lookout for are the following.

  • There is no air. In spite of the fact that it may seem apparent, one of the most noticeable signs that you should be on the lookout for is a lack of air moving through the vents while you’re attempting to turn on the heater or the air conditioner. You should be able to feel some air flowing out when you turn the knob or push the button
  • However, if you don’t feel any air coming out, the blower motor resistor has failed on you. The fact that you’re seeing high speeds is not a guarantee that you’re encountering a problem with your internet connection
  • It might be a sign of a variety of other issues as well. As previously stated, a blower motor resistor is not required in the following two scenarios: (1) When the fan is totally turned off, or when the fan is operating at maximum power. When the power is high, the current skips the resistor since it does not require modulation in any case. As a result, if you discover that your heat and air conditioning can only be turned on at high power after being turned off entirely, it is almost certain that you have a broken blower motor resistor
  • Low speed only. Given what we just mentioned about how high-speed only works as a sign of a broken blower motor resistor, it seems a bit odd to suggest that when your fan only operates at low speeds, it may be an indication of a poor blower motor resistor. Nonetheless, if there is a problem with the wiring between the blower motor resistor and the blower motor itself, it is conceivable that the fan will only operate at low speeds and will not switch off completely. If your fan will not turn off no matter what you do, and it will continue to run continuously no matter how you try to adjust the speed, volume, or turn it off, this indicates that the blower motor resistor is not effectively controlling the electrical current. Some of the settings for the blower motor are functional, while others are not. Your blower motor should be capable of operating on a variety of settings ranging from low to high, as well as many mid-range levels. The fact that some of those intermediate settings work and some of them don’t indicates that there is a problem with the switch and how it transmits the signal to the blower motor resistor about what it is you’re attempting to set the blower motor to
  • Nevertheless, this is unlikely. Vents for smoking. A defective blower motor resistor can cause this type of problem, although it is not unheard of in some situations. It is possible that if there is a short of some type around the blower motor resistor and the wires begin to melt, the fan will blow the smoke produced by the melted wires back into the cabin of your automobile. A good rule of thumb is that if you see any smoke coming into your automobile through the vents, you should pull over immediately and investigate the source of the smoke. If it isn’t the blower motor resistor, it might be something much more dangerous, and you should have it checked out as soon as possible
  • Else, it could be a blown fuse. There’s a burning scent. Similar to the smoking vent problem, you may not observe any real smoke pouring into the cabin of the car, but you will detect a distinct burning smell that indicates that some metal or plastic is scorching somewhere in the vehicle, similar to the smoking vent problem. This is frequently associated with one of the other symptoms that we’ve already discussed
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A faulty blower motor resistor may frequently be identified by doing a visual check. As previously stated, this component is positioned on the passenger side of the vehicle, behind the dashboard. Some versions had a door that could be opened through the glove box, but others required the dash to be completely removed in order to access to it. As a result, it is not always simple for someone to do this activity from their own residence. Once you’ve gained access to the component, if you’re lucky, you’ll be able to tell right away if it’s rusted, since if that’s the problem, it should be obvious just by looking at it.

  1. If rust is not the issue, attaching an ohmmeter to the blower motor resistor and measuring the resistance would be another approach to determine whether or not the resistor is failing.
  2. If it displays a different reading, such as an open circuit, it indicates that the resistor has failed and must be replaced.
  3. Occasionally, even after replacing the blower motor resistor, the blower motor itself may continue to struggle, causing the resistor to fail soon again, despite the fact that the resistor was replaced recently.
  4. If this is the case, it is likely that the worn-out part is to blame.
  5. The blower motor resistor may be stressed further if it is not changed, resulting in the failure of the blower motor resistor as well.

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

A blower motor resistor is not one of the more costly components to repair on a car, but it is one of the more difficult. You can get a broad selection of blower motor resistors atAutoZoneright now, with prices starting as low as $12 and up to $50 or $60 depending on the model you choose. In the grand scheme of things, that’s not too awful for vehicle parts. Repairing and replacing the blower motor resistor will certainly have a varying cost based on where you reside in the globe and what make and model of vehicle you drive.

In addition, if you’ve ever needed something fixed and obtained quotes from several shops around town, you’ve probably observed that one mechanic may charge nearly twice as much as another mechanic for the exact same service.

Assuming all other factors are equal, the process of repairing and replacing a blower motor resistor is not nearly as complicated as the process of replacing a blown gasket head, for example.

In order to have this item repaired, you could anticipate to pay something in the neighborhood of $50 to $150 in labor costs plus the cost of supplies.

Can I fix my blower motor resistor myself?

How well you understand blower motor resistors and car repair in general will determine whether or not you can repair a blower motor resistor on your own. In all likelihood, you’re not familiar with blower motor resistors and what they perform if you’re reading this tutorial. As a result, we do not advocate attempting to repair this yourself because it is beyond the scope of a beginner’s repair. That is not to imply that changing the blower motor resistor would be difficult for you to undertake on your own, but it would be a complicated operation.

  • If you are not totally aware with your car’s electronic systems and how they interact with one another, attempting to get into the vehicle and solve the problem on your own might unleash a whole new bag of worms.
  • Naturally, if you decide to do this task on your own, the best course of action would be to watch a YouTube video like this one, which walks you through the process of replacing the blower motor resistor step by step.
  • You should try to find a video tour that covers your specific make and model as well, because the differences between a 1965 Aston Martin and a 2015 Nissan Altima are pretty much night and day in terms of functionality.
  • It is, however, a time-consuming technique that, if you are not already familiar with working beneath the hood of your vehicle, may push the boundaries of your automobile repair abilities.

Final Thoughts

The resistor for the blower motor is a compact and reasonably priced component. Of course, your automobile will continue to work without it, but your level of comfort will suffer if you are unable to control the temperature and air conditioning in your car. If you’re having an issue with the air flow in your car, you’ll want to get this problem assessed and treated as soon as possible for your personal piece of mind and to avoid the possibility of a larger problem with your electrical system developing.

Signs & Symptoms of a Bad Blower Motor Resistor

Image of a car heating vent from user robert mobley. In the blower motor, the resistor is in charge of passing the electrical current that is necessary to drive air through the vents of the vehicle. Blower motor resistors can become worn over time, and the blower motor will no longer function properly as a result.

When the resistor of the blower motor fails, a number of symptoms manifest themselves. Here are a few of them. Recognition of these symptoms, as well as replacement of the resistor, restores the correct amounts of airflow through the vehicle.

Intermittent Operation

Image of a car heating vent from photographer Robert Mobley. During the operation of the blower motor, the resistor is responsible for passing the electrical current necessary to move air through the vehicle’s vents. Resistances in blower motors can become worn and cause the blower motor to stop functioning properly. It is possible that the blower motor’s resistor will fail and cause a number of different symptoms. Once these symptoms are identified, the resistor may be replaced to restore normal airflow levels to your automobile’s interior.

No Lower Settings

The lower speeds of the blower motor require less electrical current to operate than the higher speeds. However, when the blower motor’s resistor fails, it causes a wider gap between the connections to be created between the connectors. It is possible that this distance is too great for the electric current to go through. It is at this point that the lower settings of the blower motor are unable to perform properly. It’s possible that the blower motor’s highest setting is still operating.

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Reduced Air Movement

Reduced airflow occurs when the blower motor is attempting to move air through the vents, but the resistor is not supplying enough power to move the air with adequate pressure to accomplish the task. It appears that the blower motor resistor is getting power, but not at its full potential. Reduced air movement can occur at all of the motor blower’s speed settings, including the lowest. According on how much of the resistor is still functional, the decreased airflow might be a temporary or intermittent issue.

  • Dale Larson is the proprietor of Aurora Auto Body and Garage in Aurora, South Dakota.

Bio of the AuthorLynn Rademacher began writing professionally in 2001, specializing on technology, family, and financial subjects. Her work has featured in several magazines, including ‘Unique Magazine’ and the ‘Ortonville Independent.’ Rademacher graduated with honors from South Dakota State University with a Bachelor of Arts in mass communication.

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When you turn on your car’s air conditioner or heater, the blower motor resistor is the component that is responsible for forcing air through the vents of the vehicle. The blower motor resistor is always under stress, which increases the likelihood of it failing at some point. In this case, your blower motor resistor may be damaged or failing if you are experiencing the following symptoms: If you try to raise the air pressure but see no difference in the pressure that is blowing, it is possible that your blower motor resistor has failed and needs to be replaced.

  • A malfunctioning blower motor resistor may occasionally only blow at particular speeds or not at all, and this might indicate that your blower motor resistor has already broken and needs to be replaced.
  • Alternatively, the mix doors that control air flow may be jammed or damaged, preventing them from properly opening to let air to flow in from the outside.
  • The blower motor resistor must be replaced if there is no air pressure coming from the vents.
  • Overheating is the most common cause of a faulty blower motor resistor in most cases.

Fortunately, heater blower motor resistors are typically not a prohibitively expensive issue to repair, depending on the nature of the problem.

3 Signs Of A Bad Blower Motor Resistor (& Replacement Cost)

Your expectations for the climate controls when you are behind the wheel of your car are that they will function properly. So, what happens when the system isn’t producing as much air as you would like it to? You may be experiencing difficulties due to a defective heater blower motor resistor in some instances. Throughout this post, we’ll go through the signs and symptoms that the blower motor resistor is failing, as well as how to locate it. We also go through the cost of replacement so that you may decide whether or not it is worth repairing.

If the problem persists, the blower motor may cease to function altogether, and you will notice that no air is being forced through the vents.

Bad Blower Motor Resistor Symptoms

When the fan becomes stuck in one position, this is one of the most prevalent signs of a problem with the blower motor resistor. Because the blower motor resistor is responsible for adjusting the fan speed, the inability to modify it may indicate a malfunction. If the resistor fails or is shorted, the blower motor may become stuck at a specific speed for some time. While you might continue to use the air conditioner or heater at his rate, you will want to get it repaired so that it can perform properly once again.

Perhaps you should check the connections between the motor and the switch to make sure they haven’t been loose or damaged in any way.

2. Various Airflow Settings Not Working

When the fan becomes stuck in one position, this is one of the most prevalent signs of a problem with the blower motor resistor. A fan’s speed is controlled by its blower motor resistor, therefore its failure to function properly may indicate a problem. A faulty or shorted out resistor may cause the blower motor to become stuck at a specific speed. While you might continue to utilize the air conditioning or heater at his rate, you will want to get it repaired so that it can perform well once longer.

You might wish to check the connections to the motor and the fan switch to make sure they haven’t gotten defective in the meanwhile.

3. No Air Coming From Vents

The failure of the resistor may result in no air being expelled from the vents when you turn on your air conditioner. The blower motor resistor regulates the amount of power sent to the blower motor in the system. When it fails, it has the capability of cutting off all power to the motor. When the blower motor does not get sufficient power, it is impossible to generate air pressure. You’re left with a heater or air conditioner that doesn’t produce any air via the vents.

However, if nothing is flowing out of the vents, there are a few other things you should look at before replacing the resistor. If nothing seems to be functioning, you should start by checking the fuses. You could also explore the possibility that the blower motor has failed on its own.

The Function Blower Fan Resistor

The blower motor resistor is an electrical component that is a part of the HVAC system and is located in the blower motor. It regulates the speed of the blower motor fan. When you alter the fan speed on your vehicle’s instrument cluster, the resistor is in charge of regulating the speed at which the blower motor operates, according to your preferences. Because the fan speed is modified on a frequent basis, the resistor is subjected to a great deal of wear and tear. It is susceptible to failure at any time because to the ongoing stress.

Heater Blower Motor Resistor Location

Most of the time, the heater blower motor resistor may be found underneath the dashboard. It is positioned in the compartment that houses the heating and air conditioning. It’s attached to the air conditioning system, and it has the ability to control the speed of the blower motor fan in the system. Some automobiles have it hidden under the glove compartment, which is another location for it. In any case, you’ll locate it near to the blower motor on the floor. When the resistor fails, it becomes more difficult, if not impossible, to vary the speed of the air flow.

There are several sections that might be the source of the same problem, but they are all placed reasonably close to one another, making diagnosis easy in most cases.

Heater Blower Motor Resistor Replacement Cost

Your car’s heater blower motor resistor repair might cost you anywhere from $10 to $60, depending on the model and year of your vehicle. This is one of the least expensive air conditioning and heating components to replace when compared to the others. Because a malfunctioning heater fan can cause the heater blower motor resistor to fail, you may find yourself having to repair both the heater blower resistor and the heater fan on a frequent basis. It’s also not a particularly difficult component to replace.

If you are not confident in your ability to replace the resistor on your own, you will need to hire a professional technician to complete the task.

It’s a good idea to shop around since you might receive a range of bids, some of which could be nearly twice the price of another service.

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

The 19th of June, 2019 When it comes to automobiles in Fredericksburg, the motor that drives the fan in the heating and air conditioning system is referred to as the blower motor. Inside or in front of the dashboard, it is frequently on the opposite side of the steering wheel or inside the engine compartment, on the firewall, depending on the vehicle. It is the blower motor resistor, also known as the blower motor control module, that is in charge of controlling the blower motor’s rotational speed.

It is used in automobiles if the blower motor has just four or five fixed speeds, as seen on the left side of this picture.

The resistor for the blower motor or the control module are often positioned within one of the ducts of the HVAC system, next to the blower motor, in most Fredericksburg automobiles.

It was common practice in earlier automobiles to put a blower motor resistor on the firewall, with access from below the hood.

Generally speaking, the most typical sign of a failed blower motor resistor is that the heater fan only operates at the maximum speed level (4 or 5) and does not operate at lower speed settings.

The majority of the time, a blower motor resistor fails as a result of corrosion or overheating.

For example, when a fan blade gets jammed by a foreign item or when the motor bearings are worn out and the motor is unable to rotate freely, this can occur.

A visual check of the resistor will frequently uncover the source of the problem.

If the resistance is not within specifications, the resistor will need to be changed.

Fan speed control, speed control, connection corrosion, blower fan on one speed, connector rust, air conditioner vent, blower motor Fredericksburg, blower motor Fredericksburg , blower motor fuse, air conditioning representative

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