The blower motor resistor is in charge of regulating the speed of the blower motor. Each resistor is an exact reproduction of the original GM component designed to fit and function same as the original AC Delco resistor. In most modern cars, the blower motor resistor or the control module are installed inside one of the ducts in the HVAC system, close to the blower motor. It is responsible for controlling the blower motor’s fan speed. The fan speed can be changed either by switching the blower resistor resistance mechanically, using a rotating lever, or electronically by the air conditioning system. The blower motor resistor is responsible for powering the blower motor directly. At high speed, the resistor is bypassed, and power comes directly from the switch. The blower motor resistor is an electrical component that is a part of the vehicle's heating and air conditioning system. It can do this in one of the two ways; both are common in modern vehicles. Standard® offers over 700 blower motor resistors as high-quality replacements that match the OE to ensure top performance. A blower fan is connected to the negative battery terminal (also called ground) on one end and to the positive battery terminal through a blower resistor on the other end. $12.99. The individual resistors inside the pack are usually wire wound and they may fail by burning out from use, and may also fail due to mechanical stresses and vibrations typically found in an automotive environment. C $63.69. The thin card type Ford blower motor resistor is the most common part used for the interior fan speed control. WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. HVAC Blower Motor Resistor Fits Ford Expedition, Escape, F150, F250, F350 Super Duty, Mustang, Lincoln Mark LT, Mercury Mariner Replaces # 3F2Z-18591-AA, YH-1715 4.7 out of 5 stars 215 $13.99 This means that the current running through the blower motor, and thus is speed is controlled by the resistor value. Blower Motor Resistor, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Each. The most common symptom of a faulty blower motor resistor is a blower fan that only works on one speed, usually high. The change in resistance then limits the current through the motor, which dictates the speed at which the blower fan works. ACDelco 22807122 - ACDelco GM OE HVAC Blower Motor Resistors. 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 burned out resistor should be replaced by the appropriate replacement from your car manufacturer. The lower the resistance of the selected resistor in a pack, the higher the current that flows through the blower fan, and the faster the fan will turn. If there is no power present at the fan, suspect a wiring fault. There are also two additional circuits used for the off state and the highest fan speed state. Estimated Ship Date: Today. Filter your results by entering your Year, Make, Model to ensure you find the parts that fit your vehicle. When you turn a knob to produce more air flow for heat or cool air, the resistor adjusts the electrical resistance to control the power sent to your blower motor. Since the blower motor and resistor are working almost constantly, it can wear out over time. See the image below. The blower motor power transistor is commonly referred to as the blower motor resistor when in the true technical sense it isn't a resistor. Copyright © 2008-2021 O’Reilly Auto Parts v (site-7dd8cd6b44-4dr2w) cv1265 catalog_main. In high speed the resistor is bypassed and power is fed to the motor directly from the switch. Find the blower resistor and detach it from the rest of the circuit. Many blower resistors control current to the blower motor in all speeds except high. Such relays can be tested by placing a finger on them and switching the fan’s control on and off. If your blower motor only works on certain speeds or is stuck on one speed, you may have a problem with the blower motor resistor. To do this, switch your multimeter to voltage measuring mode and verify that the voltage difference between the fan’s terminals is 12V. order. It is responsible for controlling the blower motor’s fan speed. When the blower motor resistor fails, 1 of the 3 or all 3 first speeds stop working. ACDelco 22807122 - ACDelco GM OE HVAC Blower Motor Resistors. This is due to the fact that the blower motor power transistor does pretty much the exact same job as the old style resistors of vehicles of the 80 and 90's. In this case, it’s best to take the car to a certified auto electrician. https://aktif.net/en/product-and-services/motor-control-and-braking-resistors/dynamic-braking-resistors. Since the blower motor and resistor are … Estimated Ship Date: Today. In the off state, the blower motor is disconnected from the power supply. The resistors are all connected to a common point. Blower Motor Power Transistor Circuit Descriptions. Part Number: RNB-973-032. Create one now. When you turn a knob to produce more air flow for heat or cool air, the resistor adjusts the electrical resistance to control the power sent to your blower motor. Replacing your current heater blower motor resistor can allow you more flexibility to ensure that the air blown through the motor is tightly controlled no matter the temperature outside your vehicle. Blower resistors, being a mechanical component, are prone to wear and are the most common point of failure in a car’s heating system. MasterPro Ignition 9 Terminal Blower Motor Resistor, Select a store to see pricing & availability, MasterPro Ignition 8 Terminal Blower Motor Resistor, MasterPro Ignition 7, 2 Terminal Blower Motor Resistor, MasterPro Ignition 6 Terminal Blower Motor Resistor, MasterPro Ignition 4 Terminal Blower Motor Resistor, MasterPro Ignition 5 Terminal Blower Motor Resistor, MasterPro Ignition 7 Terminal Blower Motor Resistor, MasterPro Ignition 1 Terminal Blower Motor Resistor, Import Direct Ignition 4 Terminal Blower Motor Resistor, Import Direct Ignition 3, 2 Terminal Blower Motor Resistor, Import Direct Ignition 5 Terminal Blower Motor Resistor. The blower motor resistor is really a pack of resistors wired in series. In some older cars, a blower motor resistor was installed on the firewall with the access from under the hood. 1 bid. Autozone is the one-stop shop for the lowest prices on blower motor resistors. If power is present on the fan’s terminals and the fan is not working, the blower fan is defective. Blower resistors are resistors which are used to control the fan speed of automotive blowers. Enchance your email experience by providing your zip code for area specific offers. The blower motor resistor adjusts the blower motor's speed. ‘HI’ is the only blower speed that doesn't depend on the blower resistor to function. The reduction in blower fan speed is accomplished thru' resistors (inside the blower resistor assembly). Your vehicle's blower motor resistor controls the speed of your blower motor. Reproduction heater blower motor resistor for various GM air conditioned models. The blower resistor is connected in series with the blower fan. Check the fuse for power on both ends using a multimeter. In the off state, the blower motor is disconnected from the power supply. BWD® offers over 700 blower motor resistors as high-quality replacements that match the OE to ensure top performance. Blower resistors are made of several resistors with different resistances. This can be annoying, but troubleshooting is easy. Time left 6d 17h left. 39 I'm also pretty sure … https://aktif.net/en/product-and-services/motor-control-and-braking-resistors/dynamic-braking-resistors. When a blower resistor is faulty, the fan will usually operate at one speed only, usually the highest speed setting possible. This is done, so the resistor or a control module is cooled down by passing air. If any of these resistances show an open circuit (infinite resistance), then the blower resistor needs to be replaced. A blower motor resistor, typically located beneath the passenger side dashboard, contains three resistors, or sets of terminals designed to generate voltage in proportion to electrical current. 9 product ratings - GENUINE FORD MOTORCRAFT BLOWER MOTOR RESISTOR MODULE W/ CONNECTORS YH-1827. To run on the slowest speed, the power runs through all three resistors. New Listing GENUINE FORD MOTORCRAFT BLOWER MOTOR RESISTOR MODULE W/ CONNECTORS YH-1827 (Fits: Ford) Brand New. When trying to diagnose a blower fan motor, the following steps should be followed: If a car’s blower motor doesn’t work at all, there are several components to be checked in the system: If the fan operates at some speed settings, but doesn’t work at some other speed settings, this means that the blower resistor is faulty and should be replaced: A word of caution: the blower resistor gets very hot during normal operation, so care must be taken to avoid burns and other injuries. With over 1,000 blower motor resistors in stock, Autozone is ready to provide you with the blower you need, no … 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 … The blower motor resistor is an electrical component that is a part of the vehicle's heating and air conditioning system. The user chooses a suitable fan speed by using a selector to connect one of the resistors in the blower resistor pack. Blower Motor Resistor, Akozon Car Engine Cooling Radiator Fan Motor Switch Blower Resistor OE: 9658508980 for 207 307 308 4.2 out of 5 stars 4 £13.39 £ 13 . This illustration shows a typical blower resistor, specifications, and test procedures vary between different manufacturers. It uses resistance to control the speed of the blower motor. O’Reilly Auto Parts has replacement blower motor resistors to fit most cars, trucks and SUVs. If the appearance is normal, it is necessary to measure the resistance across each individual resistor. Sometimes, only some of the speed settings will be faulty while others might work. Clicking from the relay is an indication that the relay is almost certainly working correctly. I congratulate it was a very nice article, but I noticed some deficiencies. If you start at the blower motor, and check resistance in the circuit, you will find the problem in no time. Check the fan itself for power presence by turning on the fan control and checking the fan itself for +12V at its terminals. Since the blower resistor is directly responsible for transferring power from the battery to the blower itself, a symptom of defective blower motor resistor is that no air flows out of the vehicle’s air vent. Switch the multimeter to the resistance measuring mode, attach one probe of the multimeter to the common point and use the other probe to measure resistances at other points. We stock all of the biggest and best brands, including Duralast, Santech and 4Seasons. Check the status of your … Don't have an EEPower account? The blower motor resistor, also commonly referred to as an A/C blower motor resistor or a heater blower motor resistor, is an important component to your vehicle’s heating, ventilation, air conditioning (HVAC) system. 5.0 out of 5 stars. For each higher speed, power flows through one less resistor. An A/C blower motor resistor uses resistance to control the speed of the blower motor. Once the resistor is located and detached, it is often possible to say whether the resistor has burned out or not judging by the physical appearance only. I am studying and working on it, how do you think? It fits almost all of the truck and sport utility vehicles like the Ford Escape, Expedition, Explorer and Lincoln Navigator from 1999 through 2012. 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. Blower Motor Resistor Thermal Fuse Replacement: Have you ever started your car up in the morning only to realize that your heater fan doesn't work on any of the slower settings but does work on high … Blower Motor Resistor - Compatible with 2003-2006 Chevy Silverado, Tahoe, Suburban, Trailblazer, … You can make up for them. Blower Motor Resistor (1159) HVAC Blower Delay Switch (7) Blower Switch (2) Blower Motor Control Unit (97) Climate Control Module (3) Air Conditioning Relay (1) PRODUCT RATINGS (52) refine search by 5.0 star rating (39) refine search by 4.0 star rating If there is power on one end of the blower fan fuse but not the other, then the fuse needs to be replaced. For the precise location, consult the repair manual for your car’s make and model. Blower motor resistor / control module problems. These resistors allow the blower motor to function at lower speeds. Location : Front Components : (1) Blower Motor, and (1) Blower Motor Resistor Quantity Sold : Set of 2 Warranty : 1-year Replacement unlimited-mileage warranty Prop 65 Warning : . Some common locations are near the blower fan motor, under or behind the dashboard, around the passenger footwell etc. The resistor generally fails because of foreign objects jamming the blower motor fan blade, which causes the resistor to overheat. 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. Check the fan relay, if the car is equipped with one. Your vehicle's blower motor resistor controls the speed of your blower motor. Find an Automotive Service Professional near you. This article will focus on mechanical blower resistors, their construction and troubleshooting. 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