Blower motor transistor fins
Blower fan inop. Replaced blower motor transistor and blower motor per Jay's suggestion. Works now! Thank you! However, I have a small issue with the blower motor transistor fitting back in it's slot. The metal fins on the back of the new one are longer and stick out further than the old one, so when I install the new one back in it's slot, the metal fins hit a plastic wall and I'm not able to screw it in. Knowing that the transistor gets VERY hot, is it an issue if it's resting against a plastic wall?? If not, I might leave it without screws as it seems to be in there pret
Experienced mechanics share their insights in answering this question :
Compare the new part and old part. If they are not the same size and fit, then they gave you the wrong part. The transistor will get very hot on the fins and may melt into the plastic if touching it.
How to Identify and Fix Common car Problems ?
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To test a blower motor with a multimeter, first set the multimeter to the “resistance” or “ohms” setting. Then, touch the probes of the multimeter to the terminals on the blower motor. If the resistance reading is infinite, that means there is an open circuit and the blower motor is defective.
One of the first symptoms of a problem with the blower motor relay is a blower motor that does not function. As the relay is the switch that supplies current to the blower motor, if it fails internally, then power may be cut off from the blower motor circuit causing the motor to no longer function.
In a blower motor, the relay supplies the power that allows the fans to circulate warmed air. Essentially an on/off switch, the blower motor relay`s reactions start and end the heating process in HVAC systems by controlling the flow of current between the power source and the motor.
Start by completely disconnecting the spindle motor from all power sources. Check each wire, including T1, T2, T3 and the ground wire. If the reading is infinite, your motor should be fine. If you get a zero reading or any continuity reading, you have either a motor problem or a cable problem.
A reading of 0 means you have a shortage in phases. A shortage means the wires short to ground, which usually leads to a break in the wire. If your reading is well above 2, you likely have an open winding. An open winding simply indicates there`s a broken wire.
The blower motor resistor controls the power to the system`s blower motor. When it fails, it can cut off all power to the motor. When the blower motor doesn`t get power, air pressure can`t be produced. You are left with a heater or air conditioner with nothing coming out of the vents.
To test the fan motor, you will need a multimeter. Set the multimeter to the ohms setting and touch the probes to the two terminals on the motor. If the reading on the multimeter is infinite, then this means that there is an open circuit and the motor is defective.
The cooling fan relay is the relay that controls the engine`s cooling fans.
To test the fan motor, you will need a multimeter. Set the multimeter to the ohms setting and touch the probes to the two terminals on the motor. If the reading on the multimeter is infinite, then this means that there is an open circuit and the motor is defective.
How Many Ohms Should A Blower Motor Have? A good blower motor is expected to read over 0.5 Ohms.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
Blower motor transistor fins
ANSWER : Compare the new part and old part. If they are not the same size and fit, then they gave you the wrong part. The transistor will get very hot on the fins and may melt into the plastic if touching it.
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Is a transistor and a blower motor resistor the same thing?
ANSWER : When you were told to replace the resistor or the transistor the person that told you did not know if you had manual or automatic a/c. Your car will have a blower resistor for manual a/c blower controls and a transistor if you had automatic a/c controls. Your blower control is manual and therefore you have a blower resistor. The car will only have one or the other and will serve the same purpose depending on the type of blower control you have. The squeaking and burning smell may be from the blower motor. I would recommend replacing the blower motor with resistor(https://www.yourmechanic.com/services/heater-blower-motor-resistor-replacement) This should fix your problem and do not have to replace blower transistor since your car does not have one.
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How do I know if my blower motor or blower motor resistor is bad?
ANSWER : Hi Johnny. About 90% of the time, the problem is the resistor as opposed to the blower motor. A professional mechanic would complete an electrical test to determine if power is being sent through the resistor to determine which one is the issue. If you want to eliminate the guess work, you could have one of our mobile mechanics come to your location to complete an AC is not working inspection so they can determine for you which is damaged and recommend the right repairs.
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Blower motor randomly works
ANSWER : The blower speed is controlled by a final stage unit sometimes referred to as a blower resistor by an auto parts store. This is located on the passenger side of the heater box and has probably failed. A lot of times this unit can fail due a faulty blower motor that has been drawing a lot of current during its operation. You may want to enlist the help of a mechanic, such as one from YourMechanic, who will have the tools and expertise to diagnose the blower circuit and correct the blower issue.
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Burnt yellow and brown wires at blower motor resistor, is this indicator of bad resistor or bad motor? 2011 Chevrolet Malibu
ANSWER : Hi there – most likely, the problem is the blower motor resistor pack. A quick way to test this is if the blower fan still works in the "Max" position. If it does, that pretty-much rules out the motor as the problem. The resistor pack can get pretty hot while running the fan in lower settings, which could damage the wiring to it just from the heat. If the resistor shorts, increased electrical load could burn the wiring insulation as well. I would suggest an electrical inspection by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.
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Front A/C blower motor working incorrectly.
ANSWER : One sure way to rule out the blower motor itself would be to observe voltage while the issue is happening. If the voltage being fed to the blower motor fluctuates, the problem is on the control side of the circuit and possibly the resistor. Hire one of our mobile experts to swing by and test the electrical system and track down this bug.
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If I get my blower motor replaced, do I also have to have my Ac recharged after replacing blower motor?
ANSWER : The blower motor on this vehicle is a simple removal and installation and does not require anything to be touched on the A/C. The refrigerant does not have to be removed. The only component that has to be removed is the glove box under cover to get to the blower motor.
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Blower motor resistor melted, replaced it turned on blower motor and it melted again in seconds.
ANSWER : The blower motor that is drawing too many amperes will melt the resistor and wiring. Anytime the resistor is melted you should replace the blower along with the resistor and connections that show any heat damage. If you need assistance with this, consider YourMechanic, as one of our mobile technicians can diagnose electrical issue and help you replace the blower motor and resistor as necessary.
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