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 speed? However, Alldatadiy.com also includes disassembly instructions for interior trim panels and exterior items like headlights and tail lights. Blower motor resistors can wear out; the blower motor no longer works correctly if this occurs. Get the BEST auto repair information Alldatadiy.com and Eautorepair.net are professional-grade shop manuals—period. It could be something as simple as low refrigerant level. The most popular service booked by readers of this article is Vehicle Engine Cooling Inspection. The blend door is usually controlled by a cable or an actuator. Please see our, Pontiac Grand Prix - Vehicle Engine Cooling Inspection - Indianapolis, Indiana, Ford F-150 - Radiator Hose - Denver, Colorado, Pontiac Firebird - Water Pump - Peoria, Arizona, Toyota Tundra - Brake Pads Replacement (Rear) - Arlington, Texas. In high speed the resistor is bypassed and power is fed to the motor directly from the switch. Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Many car makers use a blower motor resistor in conjunction. Signs & Symptoms of a Bad Blower Motor Resistor. document.write(new Date().getFullYear()) Ford Mechanic: drobbi , auto mechanic replied 13 years ago OkCustomer It sounds like your blower has gone out, Or power to the blower is not not working. The blower extreme velocity would additionally be controlled via a separate extreme velocity relay alongside side the fan change so as that must be undesirable besides. It uses resistance to control the speed of the blower motor. Worn blower motor causes repeat blower motor resistor failure. The statements expressed above are only for informational purposes and should be independently verified. Common signs include the car's heater not working or getting stuck on a certain speed, or something getting jammed in the blower motor. In that case, the blower motor resistor will fail repeatedly. Blower Motor Resistor Testing. This is a telltale sign of a bad blower motor. The blower motor resistor is the component directly responsible for controlling the blower motor fan speed. Made with ♥ in Silicon Valley. Common signs include cooling fans running for a long time or not at all, as well as weakened air flow. The blower motor resistor is a small electrical component that can cause noticeable issues with the passenger compartment’s air when it fails. The blower motor resistor can be tested with several continuity tests to find out if it's bad and behind the blower motor issue on your Ford. Blower motor resistor - bad part or something else? Eautorepair.net redraws factory wiring diagrams in color and includes the component, splice and ground locations right in their diagrams. When the blower motor resistor fails, 1 of the 3 or all 3 first speeds stop working. So, if you are experiencing these symptoms, your blower motor resistor may be bad or failing: I just dont know how to tell if is the blower motor itself or the resistor, and of the resistor- where is it. Blower resistors can … Check your cabin air filter as they get dirty very quickly. In most cases, their diagrams are right from the factory manuals. But they’re not always successful. 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. Normal wear due to time and use. Optimize fleet uptime and compliance via mobile vehicle repairs, Partner with us to simplify and scale fleet maintenance, Over 25,000 topics, from beginner tips to technical guides, Check cars for recalls, common issues & maintenance costs, Hand-picked, community-rated professionals, Our mechanics make house calls in over 2,000 cities, Explore nationwide job opportunities for automotive technicians, Trusted mechanics, rated by thousands of happy car owners, Fleet maintenance with certified mobile mechanics. Another symptom of a faulty blower motor resistor is no air from the vehicle’s vents at all. Another common symptom of a faulty blower motor resistor is a a blower motor that does not function on certain settings. To reduce the likelihood of failure, car makers locate the blower motor resistor in the heater duct so it’s subject to cooling airflow. What Is the Difference Between Climate Control and Air Conditioning, Symptoms of a Bad or Failing AC Fan Control Module. A common symptom of a faulty blower motor resistor is a blower motor that is stuck on one setting. The heater blower motor resistor in your car leads a hard life. as a blower motor ages and wears, it can draw more current—more current than the blower motor resistor was designed to handle. To run on the slowest speed, the power runs through all three resistors. However, other factors can cause the blower motor resistor to fail prematurely. On many vehicles, the blower motor resistor, which comes as a module that connects to an electrical wire and is mounted near the blower motor, is accessible by … A common symptom of a faulty blower motor resistor is a blower motor that is stuck on one setting. In that case, the blower motor resistor will fail repeatedly. During the summer, you need air conditioning to ensure comfort and safety, and during the winter, you’ll need heat for the same reason. One of the first symptoms of a problem with the blower motor relay is a blower motor that does not function at all. Conduct an amperage draw test at the same time to rule out excessive current draw from the blower motor. Nov 03 2017, 10:33pm. That saves a lot of time because you don’t have to refer back to the component locator or circuit locations. This is why at the bottom of the article we include a 2008 F150 blower motor wire diagram. No air from the vents The blower resistor is connected in series with the blower fan. At high speed, the resistor is bypassed, and power comes directly from the switch. © it particularly is a symptom of a bad resistor or fan change or the two. Is brought in for your A/C being inoperative are only for informational and! 3 or 4 speeds use a blower motor is going bad the issue good. Motor resistor uses resistance to control the speed switch to provide three or four blower motor longer! 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