Blower Motor

I don't know if my AC/Heater blower motor stopped working or if its a loose wire someone cause it was just working yesterday. Or if it is the Fan Speed knob area tht went bad??

My car has 151000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
This could certainly be a loose wire or a faulty blower motor, however commonly the blower motor relay does tend to go out causing the motor not to work at all. The blower motor relay supplies power to this motor when you turn the switch to "on" that can sometimes fail. When this happens, you may notice that you will not feel anything blowing out of the vents at all. This may also cause the blower motor to work intermittently. I would suggest having an expert from YourMechanic come to your location to diagnose your vehicle’s blower motor system.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

The standard engine for both the coupe and sedan is a 148-horsepower, 2.2L Ecotec four-cylinder.
LS and LT models use a 2.2-liter four-cylinder that makes 148 hp and 152 pounds-feet of torque. Sport models hold a 171-hp 2.4-liter engine. Both engines are available with a five-speed manual or a four-speed automatic transmission. Antilock brakes are standard on 2LT and Sport models and optional on LS models.
The 2008 Chevy Cobalt has two engine options. The base is a 2.2-liter four-cylinder engine that makes 148 horsepower and 152 pound-feet of torque. The more-powerful Cobalt Sport has a 2.4-liter High Output 4-cylinder engine that makes 171 horsepower and 167 pound-feet of torque.
How Long Will the 2008 Chevrolet Cobalt Last? A properly maintained 2008 Chevy Cobalt should be able to last around 250,000 miles, about 50,000 miles less than a top rated competitor like the Toyota Corolla.
The 2L is a 2.4 L (2,446 cc) 4-cylinder diesel engine.
A direct injection version of the 2.2 L (2,198 cc) Ecotec features 153 hp (114 kW) of power at 5600 rpm and 162 lb⋅ft (220 N⋅m) of torque at 3800 rpm with a compression ratio of 12.0:1, and has been available in: 2003 Opel/Vauxhall Vectra.
The Cobalt pulls down highway gas mileage ratings in the low to mid thirty mile per gallon (MPG) range. From 2005 through 2007, the supercharged Cobalt SS, proudly carried the Chevrolet banner in the compact racer wars.
Engine Oil

Capacity: 5 quarts. . . . . . . . . . . . . . (with filter). After refill check oil level.

A simple way to increase the Ecotec`s power production is by adding a cold air intake system. Aftermarket part supplier AEM and K&N Filters each promotes a range of bolt-on intake assemblies accommodating most Ecotec engine sizes.
If you want to go that fast, the Cobalt has a top speed of 160 miles per hour. Despite this excellent power train output, the Chevrolet Cobalt`s fuel economy is rated at 25 miles per gallon in the city and 37 highway miles per gallon.
This car was equipped with a 2.4 L naturally aspirated Ecotec inline-4.
All 2008 Chevrolet Cobalt models are powered by four-cylinder engines, observes ConsumerGuide. Of those, Car and Driver reports base models “are powered by a 2.2-liter four-cylinder with 148 horsepower.
The standard engine is a 6.0-liter V-8 that produces 353 horsepower and 373 pounds-feet of torque. A 6.6-liter turbo-diesel is optional; it makes 365 hp and 660 pounds-feet of torque. Both engines are mated to a six-speed automatic transmission.
The standard engine is a 6.0-liter V-8 that produces 353 horsepower and 373 pounds-feet of torque. A 6.6-liter turbo-diesel is optional; it makes 365 hp and 660 pounds-feet of torque. Both engines are mated to a six-speed automatic transmission.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

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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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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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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Loss of voltage at blower motor when it is connected to regulator – regulator is brand new
ANSWER : Hi there. The issue you are having is not the resister, but rather the switch. The switch contacts are shorting out back to the battery causing the a/c blower not to work. I recommend replacing the a/c blower switch. If you need further assistance troubleshooting your vehicle, then seek out a technician, such as one from YourMechanic, that can assist you with replacing the switch.

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Fan blower motor not working replaced resistor and blower motor but I don’t know we’re the fuse or relay is located
ANSWER : The fuse and relay is in the power distribution center which is mounted under the hood on the left side of the engine compartment. Remove the top cover and look on the under side of the cover. You will see a diagram showing the position and name of each fuse and or relay. Keep in mind to make sure you are correctly oriented with the position of the fuse block. It can be confusing at times.

In addition to the fan motor, relay, fuse, and blower resistor, the A/C heater controls the fan speed selection. These are known to fail on Chrysler products. A scanner capable of communicating with the climate control system is necessary to diagnose this system. To avoid any unnecessary repairs, have a certified technician, like one from YourMechanic, diagnose your heating & A/C issue firsthand.

Good luck!

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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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