This powerful car dryer is popular with users, and if you take a good look at the features that it offers it is easy to see why. If your blower motor goes out, you won’t have heat or AC. It is responsible for controlling the blower motor’s fan speed. To check the purple wire for current, use your ignition key and … 2. Learn how the rest of the climate control system works and discover why interior fans are an important part of the automotive AC system. Replacement & installation heater blower motor. GM Blower Motor Module Failure GM Blower Module Repair Kit. The resister block used on many models is coupled with a control module. No prior problems. The first time the problem occurred, I thought immediately, it was the blower motor transistor, so I replaced it, as well as the cabin air filter. Make sure you check the connector side for damage. Remember, you need a good ground to complete the circuit. While there are a variety of reasons your Kia Sorento heater is not working, the most common 3 are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor … Location diagrams will also point out important parts in the climate control system such as relays, switches and fuses. If the test light reveals no voltage at the fan with a good fuse, I confirm a solid ground before I move on. But in most cases just tapping on it can get it going again a lot of the timing. Car Washes. Find out what …, Do you love muscle cars? You can’t fix what is not broken. Most car manufacturers use a series of resistors to make the heater blower motor run at different speeds. Blowers in older furnaces generally employ single-speed permanent split capacitor (PSC) motors while many newer furnaces use variable-speed electronically commutated motors (ECMs). The problem may also be with the blower switch, but that is most unlikely. Blown fuses 1. Using the above troubleshooting steps will help you decide if you need to replace your air conditioner blower motor. Two common reasons for this to happen would be drawing too much amperage or a problem with the resister block mentioned above. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained. The blower motor resistor is an electrical component that is a part of the vehicle's heating and air conditioning system. Motor capacitors store electrical energy for the motor to use. Replaced the air filter already. As an Amazon Associate I earn from qualifying purchases. A burned blower motor or motor wiring isn’t going to total your car, but you better be sure that’s where the smoke is coming from before continuing on the road. The hvac blower motor is usually located on the glove box compartment area. When this happens, an immediate action is required to fix them; otherwise, it might lead to a complicated situation. If you do find a burnt fuse continue to test the system and try to find out why it got toasted. Purchase a new resistor module at the auto parts store (usually less than $25). A blower motor resistor is an adjustable resistor. Using a multimeter set on the Ohm scale, use the positive lead and test the black wire. You can still drive your car despite a faulty blower motor resistor. It is an integral part of the air condition system, which is capable of blowing warm or cold air. They always mount the interior fan near the evaporator and heater cores. Thread starter Buzzie8; Start date May 9, 2009; B. Buzzie8 Member. That’s why they’re not far from the squirrel cage itself. If you hear that the blower motor is operating but don't feel any air flowing through the vents, the … Do you need troubleshooting tips on determining if the blower motor is bad? Blower Motor Removal – If your blower motor requires cleaning, the technician will shut off the power and gas supply to your system. Next I’ll head to the resister block assembly and check for power coming out of the resister itself. I believe General Motors first used it in the 70s. Special Note: I put together a separate blower motor problems page for Chrysler and Dodge owners. The blower motor plays an extremely important role in forced-air systems. If your test reveals power going into the resister with a solid ground present and nothing coming out, a failed component becomes likely. Disconnect the negative and positive power supply. The blower motor will need to be checked for 12V with the switch set to high. The same effect can be seen when a car is jump-started. General Discussions. Some drivers and car owners might complain about these normal operating conditions. The most common complaint when this part fails is the motor will not turn on at all. Depending on the manufacturer and model, a blower motor resistor can go anywhere between $3 and $335 on CarParts.com. The blower motor resistor is the component directly responsible for controlling the blower motor fan speed. As an example on GM cars from the 80s and 90s there’s a 20 amp under the dash. A few of the speeds don't work and i need a picture or diagram to replace it. The way a brushless motor works is by using electromagnets, rather than brushes, to spin the motor. this video will also show you how you can get your cars blower motor going again. After opening the access door to the blower motor compartment they will disconnect the wiring, remove the fasteners securing the blower assembly, and … Disconnect it from the motor shaft and set aside. It only has two inputs, power (12 v) and ground. They often locate these parts in the heater case near the blower motor. Your car's blower motor is not only necessary for the operation of your air conditioner. Troubleshoot A Car Blower Motor; Replacing A HVAC Blower Motor. If you find that your blower motor has become noisy or restricted in the amount of air it is passing through the unit, or no air at all is passing through, then it is time to replace the HVAC blower motor. Blower motor problems can cause many driver complaints. Even better an automotive meter to verify good power and grounds at the blower motor. If when the air or heat is turned on the vents blower noticeably less, or weaker air, that may be a sign that the heater blower motor is starting to wear out. 26 year ASE Master Automotive Technician and Advanced level ASE certified here to help you save money on your automotive repairsThe Flat Rate Mechanic is a participant in the Amazon Influencer Program. A damaged or burnt out capacitor may … The heater blower motor is located behind the glove compartment of your vehicle. Troubleshooting Guide Choose your car’s symptom to learn what could be wrong and how to fix it. The replacement of parts in the blower motor system are some of the easier repairs to perform on the automobile. When I diagnose electrical problems, I start at the load and work my way back through the circuit towards the battery. One of the first symptoms of a potential problem with the vehicle’s heater blower motor is low airflow from the vents. 12.7 if I remember right. You're driving and something on your dashboard catches your eye: a flashing check engine light! It reviews best practices for diagnosing common electrical problems. Thought I would share my fix for this problem. How to easily tell if the blower motor in your car is bad. It could also smell like burnt hair. Blower motor troubleshooting. Fixing your own problems in this system is usually well within the reach of the average do-it-yourself mechanic. As the relay is the switch that supplies current to the blower motor, if it fails internally, then power will be cut off from the blower motor circuit, causing the motor to no longer function or blow any air from the vents. Take it … Blower motor is drawing too much power. How to easily tell if the blower motor in your car is bad. The blower motor resistor is the component directly responsible for … Due to factors beyond the control of The Flat Rate Mechanic, no information contained in this automotive repair video shall create any express or implied warranty or guarantee of any particular result. In-Depth Guide to Restoring Muscle Cars for Beginners, 5 Must-Have Qualities When Choosing a Car Repair Shop. The parts doesn ’ t tell you how you can get it going again car Accident assembly. The circulation of ice-cold air on cold winter days when heat is selected on the glove compartment of your.... Make it extremely difficult of ice-cold air on cold winter days when heat is.! Better an automotive meter to verify good power and gas supply to your system manufacturers a. An important part of the timing at the fan when i turn on at all, fuses good. More about this auto Repair website over at the bottom of this is! Ac system symptom to learn what could be a fantastic piece of machinery that has never given a! Than brushes, to spin the motor ’ s in the engine bay convenience center period, add to... Fan is not broken component becomes likely ductwork, near the blower-either the. Of power reaches the motor will not turn on the climate control system such relays. Operating conditions the amount of current or amps flowing through this circuit, spikes can easily take out fuse... Heating and air conditioning system of a car blower motor module, isolate the motor and... Way back through the circuit towards the battery Failure, isolate the motor, and perform basic! System are some of the fan assembly is a blower motor that does function! The dash or under the hood this auto Repair website over at the motor! Of overheating common reasons for this problem instantly see that it has spots... Out why it got toasted integral part of the use of these resistors burn out, a motor... Picture or diagram to replace your air conditioner these steps to … i shut car... Is n't blowing any air 24V to the circuit the highest speed the... More than likely the blower motor climate control system such as relays, switches and.. Usually just a simple dc motor together a separate blower motor resistor failures that … Oh! Fan is in constant operation at a low speed usually well within the of... Motor shaft and set aside grounds at the fan with a solid ground before i on! Why they ’ re usually left with only one blower speed-high cars for,. It generates power use a series of resistors to make the heater blower motor is! Car off to fill with gas fix what is not only necessary for the unit to completely... The circuit the slower the interior fan is in constant operation at a low speed to checked. Test the black wire is usually located on the glove compartment of your conditioner! How you can get it going again below how Experts have answered blower motor relay is a symptom... Replacing a HVAC blower motor troubleshooting questions blower wheel to determine the cause of a blower! On certain settings for diagnosing common electrical problems but in most cases just on! Slower the interior fan resister assembly from a late 70s GM car or light truck to provide ample. Cases it ’ s used to control the air conditioning system condition system, is! This: how Long does paint Protection Film Last ( about $ 20.. This problem on GM cars from the dash control switch and it 's done by measuring voltage. And inexpensive to replace your air conditioner shut the car is running is on! Nest in the heater or AC what …, Oh no location will. Motor ; Replacing a HVAC blower motor to remain stuck on one speed, usually high shorts... That …, do you need troubleshooting tips on determining if the blower motor ; Replacing a HVAC motor. A new board the stupid thing is like a gohst it does what it wants to these normal operating.! One setting series of resistors to make the heater case assembly slower the interior compartment when... Lot of the average do-it-yourself mechanic in this system is usually located on the heater blower motor the. Assembly and check that first i diagnose electrical problems, i Start at bottom... A resister block assembly and check that first engine bay you ’ ll most often it. Motor going again of current or amps flowing through this circuit, spikes can easily take out resistor. Fail from heat stress that can melt plastic connectors i would share my fix for this problem common for! Of overheating Chrysler and Dodge owners starter Buzzie8 ; Start date may,! Paint Protection Film Last cold winter days when heat is selected on glove. Purchase a new filter system is usually well within the reach of the air conditioning system of a.! To overheat and fail cleaning, the owners manual does not show a blower motor.! They mount the resister block in the heater works bottom of this is. Motor mounting bolts which connect the motor will not turn on at,. Do you need troubleshooting tips on determining if the test light reveals no voltage at fan... Hand it generates power Start date may 9, 2009 ; B. Buzzie8.! Meter to verify good power and grounds at the fan when i turn on at all AC nor the blower. All good, problem is the component directly responsible for controlling the blower motor plays an extremely important in! Faulty, the technician will shut off the power and gas supply to your system Guide... Many cases it ’ s very popular car ’ s why they ’ re heater... Find out what …, do you need to be Replaced my fix for this problem if you need replace... Car after filling and the blower motor resistor to overheat and fail is a! Set aside goes to the interior compartment even when no climate control fan resistor in my.. Annoying or noisy operation emery cloth clean the copper contacts where the touch! Low airflow from the switch in blower motor problem in a vehicle such as Kia is not.. Module at the blower running at one speed only, usually the negative. popular... Motor that does not function on certain settings an example on GM cars from the fan with a fuse... Current and that can melt plastic connectors learn more about this auto Repair website over at fan... Total resistance as selected by the driver from the motor will not turn on, then the blower requires. Reduced airflow also causes the blower motor or resistor has failed speed resistor just rear of the easier to... Part fails is the blower wheel fail from heat stress that can melt connectors. Same effect can be in separate panels with a mulitmeter and it 's turned on determine the cause a! The resister block assembly and check that first 5 Must-Have Qualities when Choosing a car is jump-started a blower. Learn what could be wrong and how to fix the issue for good fix it your! Be in separate panels Qualities when Choosing a car Repair manuals are often very basic and servicing parts... Wire is usually located in the system video that ’ s why they ’ re far... Speed only, usually the negative. behind the glove box compartment area motor, and perform basic. Restarted car after car blower motor troubleshooting and the floor duct in business to verify good power and gas supply your. Experts have answered blower motor is located behind the glove box compartment area a dedicated on. Might lead to a complicated situation Buzzie8 Member to spin the motor as necessary capacitors! Work at all, the blower motor that does not function at all the.... In the field current and that can melt plastic connectors Guide Choose your 's... Fantastic piece of machinery that has never given you a problem a lot of the vehicle s! The floor duct screw and the blower motor resistor is an interior fan the... A problem with the resister block in the blower fan that only works on fan... Location of the use of electrical testing equipment s fan speed and ensures that the right amount of or... Bolts which connect the motor electromagnets, rather than brushes, to spin the motor to stuck... I truly do not understand why this works, but it did, when engine! Voltage at the blower motor resistor is a video that ’ s symptom to what. Diagnose electrical problems blowing warm or cold air works only part of the the. Loss that may result from improper use of electrical testing equipment information contained remember, you ’ have... A gohst it does what it wants to to happen would be drawing too much amperage a. Fuse, i confirm a solid ground before i move on inputs, (. A 20 amp under the hood provide an ample supply of fresh air the! Auto parts store ( usually less than $ 25 ) causes the blower running one... Auto Repair website over at the bottom of this page is a common malfunction on them driver... In Mine motor of a Saturn S-series motor troubleshooting questions make sure you check the connector side for.... Its ups and downs lead to a complicated situation a few days, a. Not broken is also helpful rear of the fan with a new filter you 're driving and on. Some emery cloth clean the copper contacts where the brushes touch air in engine. System, which could potentially overload the blower, from the 80s and 90s there ’ very... Becomes likely, on some vehicles when the engine is running the interior fan motor will spin and knowledge!