Blower motor issue

Blower motor issue

Okay So on my impala. The blower wont shut off. Even when i kill the car with the switch. The blower fan still runs and blows air. I replaced the climate control cluster, that didnt fix the issue. I replaced the blower motor control resistor and that didnt work. The only way i know how to kill the fan is unplugging the restistor or pulling the 30a fuse from under the hood. But i want to know how to fix this issue. I took a gaget and hook it to the plugs and turn the fan blower on thats on the cluster and it got a signal. i turned it up higher and the gajet read it. then i turned it off and i g

Experienced mechanics share their insights in answering this question :

Hey there, thanks for writing in. The blower is controlled by the blower resistor/controller and the controller is controlled by the climate controller. You replaced both of these but one of the two is shorted causing the blower to be grounded all the time. You need to isolate the two components to see which one is defective in order to diagnose the issue. From there, you can have the part repaired or replaced accordingly.

How to Identify and Fix Common car Problems ?

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

Reasons a Chevrolet Impala AC Isn`t Working. The most common reasons a Chevrolet Impala ac isn`t working are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor. You may not realize there`s a refrigerant leak until the air conditioner stops blowing cold.

The blower motor resistor is responsible for controlling the blower motor speed. In the past, this was done by varying the voltage supplied to the blower motor. In newer applications, the blower motor resistor is actually a solid state module that sends a varied signal to the blower motor.

The fuse box should be under the hood, passenger side. Try the upper box, middle right side Mine is huge, 30 amp. 73 people think this is helpful.

If your air handler is running but not blowing air, there are two likely scenarios; either a broken AC blower belt or an issue with the motor itself. If the air handler is humming or buzzing, but not making the mechanical sounds of a motor running, you`re most likely talking about an issue with the motor itself.

The primary cause of tripped breakers and blown fuses is a dirty air filter. One simple maintenance task any homeowner can handle is replacing their system`s air filter on a routine basis. Many experts agree that you should change your filter at least once a month during the peak of the cooling season.

The blower motor relay is the electrical switch that is used to supply the power for the vehicle`s blower motor. The blower motor is the component responsible for pushing air through the vents of your vehicle`s heating and air conditioning systems.

Fuse Protection

To protect the blower motor power circuit, a 20-, 25- or 30-amp fuse is usually located in the fuse panel under the dash. The rating of the fuse will depend on the vehicle application and how much power the blower motor requires at full speed.

Locate the reset button on the furnace and press it to reset the furnace. It is usually located inside the blower compartment on the side of the blower motor. Be cautious as the housing may be hot. If the button is popped up, press it down.

If the fan doesn`t work, before pointing the finger at the blower motor, check fuses for the motor to make sure they`re still good. Many vehicles have two fuses for the blower motor, one in the interior fuse block and the other under the hood. The blower motor is usually under the dashboard on the passenger side.

Nine times out of 10, weak airflow is caused by a clogged up cabin air filter. Over time, this filter catches all dirt and debris, which can build up and slow or stop the flow of air. It`s typically located under the dash on the passenger side or inside the glove box and should be cleaned or replaced regularly.

The most common causes of broken air conditioning are leaks or compressor issues. If your air is blowing cool but not cold, the problem could be a clogged filter, cooling fan problem, radiator trouble, or it could simply be that you need to recharge your AC.

Clogged or dirty air filters can restrict airflow and reduce your AC system`s efficiency. Locate the air filters in your system and inspect them. If they`re dirty or clogged, replace them with new ones. Solution: Check your air filter.

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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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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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 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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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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Blower motor issue

ANSWER : Hey there, thanks for writing in. The blower is controlled by the blower resistor/controller and the controller is controlled by the climate controller. You replaced both of these but one of the two is shorted causing the blower to be grounded all the time. You need to isolate the two components to see which one is defective in order to diagnose the issue. From there, you can have the part repaired or replaced accordingly.

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My car ac a year ago stopped working on settings 123 only works on 4 I did the research so I do know it is the blower motor an ha

ANSWER : In your application, there is a replaceable blower motor resistor block. The resistor block permits multi-speed operation of the fan. If some fan speed settings work, but not others, the first thing to do is test the resistor block with a volt ohmmeter. If you desire testing, and replacement, as needed, please request a blower motor/resistor block diagnostic and the responding certified mechanic will get this taken care of for you.

With regard to the A/C system, if gauge pressures (high and low) are normal when the system does operate, there are really only two principle possibilities for intermittent operation. One is circulating moisture in the system (due to a saturated dryer) which periodically freezes (and thaws) at the expansion valve and the other is a failure in the A/C control system, that is the clutch, sensors, and other electronics that control the compressor cycling. The cause of the problem can be readily found if you request an A/C system diagnostic. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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