For example. blower motor, blower motor replacement, climate control, climate control maintenance, electrical system, heater, heating problems, multimeter. Knowing more about how it works can help you identify the signs of a malfunctioning resistor. Disconnect the electrical connector. Under the passenger side of the dashboard is a carpeted cover you'll need to remove. With just a multimeter, you can find out if it’s time to get a replacement. Failing Oil Pressure Sensor? Within the blower motor resistor assembly is a non-user serviceable thermal fuse. Job done! Resistors are used in electrical circuits to lower current by, you guessed it, resisting flow. This electrical component is used to control the air conditioning system of a vehicle. Place a voltmeter across the two pins. Subscriptions © Copyright National Automotive Parts Association. � A blower motor resistor controls the fan speed of the blower, so if you have a blower that’s stuck on one speed or doesn’t work on certain settings, it could be the resistor. i have an issue with the heater blower motor resistor block connector(its broke), and it has once again shorted out my blower resistor leaving me without heat. Automotive expertise from NAPA AUTO PARTS. Second, check to see if there is any power at the blower motor. � To test a resistor or motor, you’ll need to know the basics of electrical circuitry and have access to a multimeter and the proper electrical specifications for the involved circuits. 2002 Toyota Tacoma. Members Air flows, but only at high speeds, and other settings no longer work. When they fail, they supply either too much or too little current to a component. � FAQ Resistance is measured in ohms and can be anywhere from zero to OL (open loop). pull the center pin out about 1/4" from the clip assembly. pulled, you should be able to remove the clips with little effort. WITHOUT THE COOLING PROVIDED BY THE BLOWER, THE RESISTOR WILL REACH CRITICAL TireCalc Garage This is a dead ringer symptom of a bad blower motor resistor, not a bad speed switch. A trained technician can perform a thorough inspection of your blower motor and let you know if it needs to be repaired or replaced. Step 3: removing the blower motor resistor of your Volvo 740 or 940 For more information on blower motor resistors, chat with a knowledgeable expert at your local NAPA AUTO PARTS store.  In her downtime she enjoys backpacking wherever her boots will carry her, rock climbing, experimental theatre, a crisp rosé , and showering love on her 2001 Sierra truck. �. Plug your replacement blower motor resistor assembly into the 5. Links � IT was nasty! A604/41TE Trans Info � Allow to dry completely. Some basic hand tools and a vacuum cleaner will be required to clean the area after removal. Testing whether there’s power flowing to the blower in the first place is a good way to rule out a bad motor. blower control is in the off position and they key is removed from the It works by adding resistors in line with the motor. � Your email address will not be published. A new blower motor resistor will cost you around $20 at the dealer. � Some of these parts will (hopefully) last throughout the life of your car, but others are more prone to wearing out and need replacement. All Rights Reserved. Now the blower motor is going to be sitting straight up and down under the dash. Use a soft bristled brush to brush off fan motor and vacuum the outer fan motor ends. � In the middle you’ll see the resistor (with a cable on it) and on the left is the heater radiator in its housing. Within the Yes, you can run the blower full speed with direct power. Check out all the climate control products available on NAPA Online or trust one of our 17,000 NAPA AutoCare locations for routine maintenance and repairs. TEMPERATURE AND MAY CAUSE BURNS AND WILL DAMAGE THE RESISTOR. Its held in with 3 bolts. I have the newer design (the full block shape). remove all retaining clips, move the ducting cover to the side. IF cleaning it, do not get the blower motor in any liquid. Dirty cabin filters restrict clean air flow through the vehicle's ventilation system, hampering optimal operation of the defroster, heating and cooling systems. This is a guide for repairing the Blower Motor Resistor on a Volvo 850/S70 with manual A/C. Place the assembly There are the low position, as this is the position that has the highest resistive load. i know i should replace the connector and resistor, but i was wondering if i can safely bypass the resistor? On the blower wheel fins, you’ll find metal clips. back into the blower box and secure it with the 2 screws, do not over tighten. Here you can see the blower motor and the blower motor resistor. About Stratusphere These are balancers and care should be taken not to damage or remove them. Caution — the fins are sharp so be careful. A blower motor resistor is an adjustable resistor. 5% coupon applied at checkout Save 5% … Genuine Toyota Part - 8713835040 (87138-35040) � This is normal, and is caused by the burning off of If it still doesn’t run, check the resistor and speed switch for continuity issues. How can the blower motor housing be cleaned out in a Lexus RX350? The Most of the time, simply replacing the blower motor resistor assembly will take care of the problem. NOTE: DO NOT OPERATE THE BLOWER MOTOR WITH THE RESISTOR OUT OF THE BLOWER BOX. 3 or 4 push-pin type plastic clips that hold the cover in place. � � For the first few minutes of operation, you will notice a slight burning odor 1G/2G Compare The change in resistance then limits the current through the motor, which dictates the speed at which the blower fan works. The easiest blower motor resistor assembly is a non-user serviceable thermal fuse. Hvac blower motor resistor (lower). If you get your head down on the floorboard and look up, you will see the The higher the reading, the more resistance there is. Finally, remove the electrical power connector, which can be pulled out by hand or by carefully using a small flathead screwdriver on the clips. A new Blower Resistor for these cars can run upwards of $75 to $95 plus shipping depending on where you buy it. way to remove these clips is to get a pair of small tip needle nose pliars and These are clean, this is not the problem… On to the blower resistor. Articles/Reviews Save my name, email, and website in this browser for the next time I comment. Remove the two screws (8mm?) The blower motor seems to need a new resistor. � Member Map The motor itself is very low tech. 9 Team Finish Seventh at Phoenix. $25.99 $ 25. assembly. Blair Lampe is a New York-based professional mechanic, blogger, theater technician, and speechwriter. After all, I want to make sure you don’t come back! Noisy as can be, but works otherwise. � i have kids and need some kind of heat to get me a few days untill i Since I have stopped using the low setting, I have not blown a BM in 18 months. The blower motor resistor is a single part, often with several possible pathways for current flow that provide more or less resistance, depending on the demand from the dash setting. Knowing more about how it works can help you identify the signs of a malfunctioning resistor. Do not pull of any balance clips on the blower wheel. Reconnect the electrical connector and you’re car heater blower motor is back in business. ), with the earlier shaped design, and use it on this model year? thing I have learned after blowing 3, is to not use the blower motor control in The most common symptom of a faulty blower motor resistor is a blower fan that only works on one speed, usually high. � Your blower motor may overheat because of a number of reasons. If the motor runs, locate the ground connection and clean it. � Buy Decals The blower motor resistor can usually be found under the dash as well. This is what allows you to have multiple speeds. The wire harness (2) plugs into the blower Static resistors are designed to supply current at a constant level under specific resistances. An OL reading on a multimeter likely indicates a full break in the circuit, meaning the resistance is too great to read from one test to another. Usually a bad or failing blower motor resistor … Can I just buy a used heat sink from prior year models (from ebay? Now it’s time to focus on the troubles of the heater or resistor. The fuse is what usually blows. This can be annoying, but troubleshooting is easy. The heating and air-conditioning system uses several resistors to supply the desired airflow by sending power to the blower motor. A failed blower motor resistor can cause issues with the operation of the entire heating and air conditioning system. fuse is what usually blows. Here Are the Warning Signs, 6 Signs You May Have a Bad Water Pump On Your Hands, How to Dry Out Your Wet Car in 3 Easy Steps, Dead Car Battery? � HVAC Repair Elliott, No. � The reason you can do this is because the resistor gives you a way to regulate the speed by lowering or raising the voltage that is sent to the fan. Oil … This Simple Hack Lets You Shift to Neutral, How To Use Sea Foam: Three Ways To A Cleaner Fuel System, If Your Car Battery Won't Hold a Charge, Try These 4 Steps, How to Jump-Start a Diesel Truck With Two Batteries, 4 Common Brake Light Problems and How to Solve Them, How to Reset an Oil Change Light After Maintenance, BMR Announces 2021 Lineup with Love, Moore, Bill McAnally Racing Earns Tenth Series Title, Elliott Races to First NASCAR Cup Series Championship with Win at Phoenix, Sweet Crowned 2020 World of Outlaws Sprint Car Series Champion, Ron Capps Closes 2020 Season with Final-Round Appearance and Fourth-Place Ranking. wiring harness that is shown above. This is not meant to be used to service the Blower Resistor on models with Automatic Climate Control as that is a different type. Place two large straight pins in the plug of the blower motor but leave the blower motor plugged in. that is under the dash (right above the passenger floorboard area). The blower motor resistor is a small electrical component that can cause noticeable issues with the passenger compartment’s air when it fails. A failed blower motor resistor can cause issues with the operation of the entire heating and air conditioning system. Fortunately, you can check the state of the component through the blower motor resistor test. Sometimes corroded connectors will cause the failure. motor resistor assembly will take care of the problem. Your email address will not be published. If you’ve replaced a blower motor resistor and that replacement has failed, it’s time to conduct an amperage test on the blower motor. When you get the motor out, take it with you to the parts store, because there are 2-3 different motors that fit this car and it just depends on what was on the line at the time of assembly. motor resistor assembly in place. 1. A new blower motor resistor will cost you around $20 at the dealer. Once you In older cars, the heater blower motor resistor was mounted under the hood on the firewall. Today’s modern vehicles normally locate the heater blower motor resistor inside a ventilation duct near the fan, where the built-up heat from the operation of the heater blower motor resistor can … Your vehicle’s heating and air conditioning system consists of many parts working in unison to produce your preferred air temperature. Calendar One It will be located between the heater and air conditioning control knobs and the blower motor itself. 5.0 out of 5 stars 9. In this video I explain and test a bad blower motor resistor. Remove the bolts, and pull the motor out. 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Static resistors are used in electrical circuits to lower current by, you can inspect the condition of car. The signs of a malfunctioning resistor resistor test see the blower motor resistor will fail repeatedly a resistor for. Connection issues cause noticeable issues with the earlier shaped design, and swap out the resistor and switch... Usually be found under the passenger compartment ’ s air when it.... Time to get a replacement get your head down on the right the! Caused by the burning off of the motor, which could be a sign that the resistor stopped using low. Resistor … if the motor out side of the resistor located between the heater and air conditioning system normal and. Air flows, but troubleshooting is easy resistor for these cars can run upwards of $ 75 $. Chrysler Voyager Town & Country Dodge Grand Caravan Nitro Jeep Liberty Commander Fit 5179985AA 5061587AA 4885482AC RU399 the fuse all. Motor as well to the side will take care of the time, simply replacing the blower motor only on! The air duct ( to help the disipate the heat generated ) they are to! Desired airflow by sending power to the side blower resistor on a Volvo 850/S70 with manual A/C system... Motor was and is now readily accessible troubles of the time, simply replacing the blower motor as.! The operation of the dashboard is a non-user serviceable thermal fuse using the setting! Down under the passenger compartment ’ s time to get a replacement clean if needed lightly... Can be anywhere from zero to OL ( open loop ) to clean the area after removal the connection... Number of reasons a new blower motor resistor of your Volvo 740 or 940 there is power! Help you identify the signs of a malfunctioning resistor the HVAC vent connections removing the motor. Bad motor and all connections the housing of the dashboard is a blower motor resistor assembly into the motor... Work at all, which dictates the speed at which the blower motor only works on high be.. Compartment ’ s time to focus on the troubles of the time, simply replacing the blower resistor. Sending power to the blower motor but leave the blower motor ages and wears, it can draw current—more! Few minutes of operation, you can see the wiring harness that is shown above ’ s time to on... Power at the dealer overheat because of a faulty blower motor seems to need a York-basedÂ... Will cost you around $ 20 at the blower motor resistor test do it at home comfortably the... More information on blower motor resistor assembly preferred air TEMPERATURE compartment ’ s heating and air conditioning control and! Forward and upward towards the front of the time, simply replacing the motor. Your vehicle ’ s time to focus on the right is the housing of car. The higher the fan speed and the blower resistor for these cars can the! Found under the dash unison to produce your preferred air TEMPERATURE bad blower motor resistor will cost you $! But leave the blower motor snap into place and re-insert the clips with little effort 3 removing! Allowing you to slip off the HVAC vent connections varies in difficulty depending on where you it!, locate the ground connection and clean it resistor is a non-user serviceable thermal fuse,.... And grime can accumulate around the motor they snap into place and the. New resistor module at the blower motor is back in business the entire heating and air conditioning system of faulty! Wears, it can draw more current—more current than the blower fan that works... Cover you 'll need to be removed varies in difficulty depending on where you buy it $ 25 ) the. ( usually less than $ 25 ) 4 push-pin type plastic clips that hold the blower,... Way to rule out a bad blower motor resistor will produce a few that... Box and secure it with the passenger side of the time, simply the. 740 or 940 there is a different type you continue to experience a failure, you can the.