Please follow the instructions below to enable JavaScript in your browser. I have a 2002 Durango SLT and my blower motor resistor wiring harness connector just burned up. Remove the screws or bolts to the blower motor resistor and remove the resistor. Check here for special coupons and promotions. Put the only one back in which seems to be working on with the controller set to high, however, the blower motor runs very very slow. Set an ohms range that is equal to or higher than the value of the, A wire in the left circuit is shorting the 100Ω, If little air is coming through the vents (hot or cold), then it could be because the, It's located inside the dash, often on the opposite side of the steering wheel or inside the engine compartment on the firewall. This page is for personal, non-commercial use. One of the first symptoms of a potential problem with the vehicle's heater blower motor is low airflow from the vents. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35.00+. If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed. Will a blower motor work without the resistor? Root cause insight into the common BMW blower motor resistor failures Showing 1-191 of 191 messages. Ads can be annoying. Autoblog is partnering with YourMechanic to bring many of the repair and maintenance services you need right to you. Larry. Simple, neat. The exact text will differ depending on the actual application you have running. The Ford blower motor resistor deployed on the automatic temperature control systems is larger and has aluminum heat sinks incorporated into the design. 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Overheating—if a motor finds it harder to move because of jamming or worn bearings, it can raise the resistor’s temperatures to dangerous levels. WARNING: The blower motor resistor may get very hot during normal operation. I quickly found out the resistors are prone to failure, so I bought one. Root cause insight into the common BMW blower motor resistor failures: ... the heat sink starts to get very hot, but the blower still runs at 80%. Another common symptom of a faulty blower motor resistor is a a blower motor that does not function on certain settings. Mine had gone open. 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. Failure to take this precaution may result in possible serious injury. The blower motor resistor is in charge of regulating the speed of the blower motor. What is the most powerful handheld blower? WARNING: The blower motor resistor may get very hot during normal operation. Installation is the reverse of the removal. Any time the blower motor is running the air flow helps cool the resistor coils. When fan speed is changed via the knob on the instrument cluster, the blower motor resistor changes setting, which changes the speed of the blower motor. The resistor generally fails because of foreign objects jamming the blower motor fan blade, which causes the resistor to overheat. You still haven't turned off your adblocker or allowed our site. I know it is the correct resistor for the CJ3 climate control, and it did bring back 1-4 on the motor switch. If this circuit is open, showing infinity on the Ohmmeter, the blower resistor must be replaced. Signs that the blower motor resistor in your Acura TL needs to be replaced may include the blower motor not working or being stuck on just one speed, or the blower motor may work only on certain speeds. Thanks for that. There is a bulletin out that tells you to replace the blower motor resistor and the resistor connector for the blower motor not working or only working on low speed,but if this is still getting hot here and melting the wiring then most likely the blower motor is … Just so, can you test a blower motor resistor? On the low setting the resistors are larger taking more load - less to motor - slower speed. If your vehicle is displaying any of the symptoms above, or you suspect that your blower motor resistor may be having an issue, have the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if the component should be replaced. Get service at your home or office 7 days a week with fair and transparent pricing. A blower motor without power will not be able to produce any air pressure, and as a result the heating and air conditioning system will be left with no air coming from the vents. Aaargh. The most common symptom of a faulty blower motor resistor is a blower fan that only works on one speed, usually high. It is responsible for controlling the blower motor’s fan speed. If the blower motor resistors’ internal components fail it may cause the blower motor to malfunction, or not function at all on one or more of the settings. Another symptom of a bad or failing heater blower motor is a motor that only functions at certain speeds. Can you eat potatoes that are black inside? Place the other lead on terminal 2 and check against specifications. When fan speed is changed via the knob on the instrument cluster, the blower motor resistor changes setting, which changes the speed of the blower motor. determine if the component should be replaced, Symptoms of a Bad or Failing Heater Blower Motor Resistor. Then they buy a aftermarket blower motor and again it keeps burning up. It can do this in one of the two ways; both are common in modern vehicles. The blower motor doesnt have speeds set into it, it runs faster when more current is applied or slower at lower current. This can be annoying, but troubleshooting is easy. It can be difficult to get at. If you'd be so kind as to allow our site, we promise to keep bringing you great content. Also if the blower motor has bad bearings, too much load blows the resistor pack. Bad dirty loose connections to either power and/or ground will increase the current over the ratings of the resistors. And thanks for reading Autoblog. Fan only blows at certain speeds. The blower motor resistor is the component directly responsible for controlling the blower motor fan speed. Just purchased a new motor off Amazon. What instruments do they use in flamenco? I went to area junk yards to see if I could find and replace the part myself. Usually a bad or failing blower motor resistor will produce a few symptoms that can alert the driver of a potential issue. Copyright 2020 FindAnyAnswer All rights reserved. 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. The blower motor resistor is an electrical component that is a part of the vehicle's heating and air conditioning system. ©2020 Verizon Media. The blower motor resistor is an electrical component that is a part of the vehicle's heating and air conditioning system. This may have happened because it's very hot here in Ottawa, or because months ago I replaced a broken blower … So I recently bought an 03 LB7 and noticed the blower motor only worked on 5. All rights reserved. I found the resistor, it has a safety cut-out where excess heat melts solder and a spring breaks the contact. Usually the resistor pack, but they blow for a reason. These cooling fins channel heat away from the internal electrical components. The Dealer wants $700 to fix it. Order Blower Motor Resistor for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. If you back the speed down anymore, it gets even hotter and then starts pulsating the blower, Still, it's gonna' eventually fail. A. It is responsible for controlling the blower motor’s fan speed. What happens when a blower motor resistor goes bad? When the blower motor fails, it will usually draw a lot of power from the electrical system and become very hot. You may order presentation ready copies to distribute to your colleagues, customers, or clients, by visiting http://www.autobloglicensing.com. Another symptom of a faulty blower motor resistor is no air from the vehicle’s vents at all. In reducing the blower motor fan speed, the blower resistor gets very hot. It is responsible for controlling the blower motor’s fan speed. Asked By: Arne Grimmeissen | Last Updated: 19th April, 2020, Trent, one of the biggest reasons for blower motor, Set a digital multimeter for "ohms." 1998 Monaco Executive A blower motor without power will not be able to produce any air pressure, and as a result the heating and air conditioning system will be left with no air coming from the vents. Blower motor resistors can wear out; the blower motor no longer works correctly if this occurs. Why place this in a duct that blows heated air too? The origional resistors are made from nichrome wire and are placed in the air stream for cooling, as they get very hot. The classic blower motor resistor is a block with various resistors inside it that will switch power to the blower through different resistors based on where the blower switch is placed. Click to see full answer Thereof, how do I know if my blower motor resistor is bad? Could very well be a relay, resistor… The most common symptom of a failed blower motor resistor is when the heater fan only runs at the highest speed setting (4 or 5) and doesn't work at low speeds. 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. It only takes a few seconds. Replaced the relay it the new super hot to the touch and only lasted two days. Also, what causes heater resistors to burn out? I have a 2014 Limited. It's mounted outside on the firewall in the heater and air conditioning core cover. The user chooses a suitable fan speed by using a selector to connect one of the resistors in the blower resistor pack. How do you change a blower motor resistor? Can you do a Bob Ross painting with acrylic paint? What are the signs of a bad blower motor? With that value, you can compute the required resistance needed for each speed. 1. Place one lead of the Ohmmeter on terminal 1 of the resistor. We get it. Weak airflow from the vents. Check your in-box to get started. If little air is coming through the vents (hot or cold), then it could be because the blower motorfor the fanor a switch or resistor that controls fanspeed isn't working. However, as a side effect of reducing current flow, resistors generate heat. This article originally appeared on YourMechanic.com as Symptoms of a Bad or Failing Heater Blower Motor Resistor. 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. Will install and report back if that works. Over time, that heat can cause the resistor to fail naturally. The thermistor is located on the resistor assembly. Don, I don't think I was too clear. If you start at the blower motor, and check resistance in the circuit, you will find the problem in no time. This means that the current running through the blower motor, and thus is speed is controlled by the resistor value. It's problem after problem. Another way may be to measure the current to the blower motor at full speed. The blower motor resistor is an electrical component that is a part of the vehicle's heating and air conditioning system. The blower motor resistor is located on the back of the blower motor housing under the dash on the passenger side. How much does it cost to play a round of golf at Augusta National? There are several symptoms that appear when the resistor of the blower motor is going bad. This can also be caused by a blower motor switch, so a proper diagnosis is highly recommended if you are uncertain of what the issue may be. The blower motor resistor often gets very hot, and can wear out or burn over time. Locate the blower motor resistor on the passenger side under the dash board. The blower resistor is connected in series with the blower fan. Normal wear due to … Just enough to defog the windscreen. i have replaced the resistor 3 … Most times this will present itself as melted areas on the wire harness. Failure to take this … In some cars, a failed blower motor resistor can cause a heater fan to stop working completely. Why does my heater only work on high? Select the option to run ads for autoblog.com, by clicking either "turn off for this site", "don't run on pages on this domain", "allow this site" or similar. If little air is coming through the vents (hot or cold), then it could be because the blower motor for the fan or a switch or resistor that controls fan speed isn’t working. Blower motor resistor gets so hot it actually cracks the blower motor resistor gets so hot it actually cracks the circuit board. Water leaking back into air system, draining into the blower motor casing, and causing blower motor to burn out the resistors and melt the resistor plug (but the blower kept running - poorly). You will need to remove the kick panel on the passenger side to get at the motor. What can cause a blower motor to stop working? A drop down menu will appear. To help keep it cool, the blower resistor block is located in the blower motor's air stream. You must be logged in to perform that action. When the blower motor resistor block fails, you'll usually see one of the following symptoms: Click on the icon for your Adblocker in your browser. If the blower motor was turned on prior to servicing the blower motor resistor, wait five minutes to allow the resistor to cool before performing diagnosis or service. it has something to do with the blower motor resistor is next to the blower motor behind the glove compartment it prevents the wires from getting to hot check the wires or connection for signs of over heating clean the connector or just wiggle it if if no reaction change the resistor is a common part to go out but not expensive at all good luck Eventually, it's this heat that's gonna' fry it. Move the lead from terminal 2 to terminal 3 and check this reading against specifications. And free is good, right? The most likely reasons for blower motor resistor failure can include: Corrosion from long exposure to air and moisture. The resistor of the blower motor is responsible for transferring the electrical current that's required to move air through the vents of vehicle. Thanks for subscribing. My blower would only work on "4". News, Reviews, Photos, Videos delivered straight to your in-box. Can you lay a washing machine down to transport? As the blower motor resistor is the component directly responsible for powering the blower motor, when it fails it major issues with the blower motor and the heating and air conditioning system can be experienced. Worst car I've ever owned! What's the difference between Koolaburra by UGG and UGG? What is the difference between fan blower and compressor? Heater blower motor resistors are generally installed as a part of the heating, ventilation, and air-conditioning system to keep the air that flows through the HVAC system cooling down the resistor. I saw many Durangos with the connector and resistor already cut out. A failed blower motor resistor can cause issues with the operation of the entire heating and air conditioning system. The blower motor is located in the passenger side foot well. Get rid of it! Does Hermione die in Harry Potter and the cursed child? I turned on the heater and my blower resistor conked out again. If the blower motor was turned on prior to servicing the blower motor resistor, wait five minutes to allow the blower motor resistors to cool before performing diagnosis or service. Hot to the blower motor is going bad partnering with YourMechanic to bring many of the resistors problem with vehicle... Vehicle 's heating and air conditioning system just burn out, and a new often... Sinks incorporated into the design to play a round of golf at Augusta National will! Acrylic paint in your browser days a week with fair and transparent pricing full speed wear out the... A failed blower motor fan speed most common symptom of a potential problem with vehicle... And remove the screws or bolts to the touch and only lasted two days foot well was! Text will differ depending on the Ohmmeter, the blower motor to remain stuck on one setting answer. 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