Why is the heater fan not working in my Chevy Cobalt?

Possible Causes of Heater Fan Not Working in Chevy Cobalt
There could be several reasons why the heater fan is not working in your Chevy Cobalt. Here are some possible causes to consider:
1. Blower Motor: The blower motor is responsible for blowing air across the heater core and into the cabin. If the blower motor is faulty or not functioning properly, it can result in the heater fan not working.
2. Heater Blower Motor Resistor: The heater blower motor resistor controls the speed of the blower motor. If the resistor is faulty, it can cause the heater fan to stop working or only work at certain speeds.
3. Heater Blower Motor Relay: The heater blower motor relay controls the power supply to the blower motor. If the relay is faulty, it can prevent the heater fan from working.
4. Coolant Level: Insufficient coolant in the system can affect the heater’s ability to produce heat. If there isn’t enough line pressure due to low coolant, the heater core may not receive enough coolant to generate heat.
5. Electrical Issues: There may be electrical issues, such as a blown fuse or a wiring problem, that are preventing the heater fan from working properly.
Troubleshooting Steps
To diagnose and fix the issue with your Chevy Cobalt’s heater fan, you can try the following steps:
1. Check the Fuse: Start by checking the fuse related to the heater fan in the fuse box. If the fuse is blown, replace it with a new one of the same rating.
2. Inspect the Blower Motor: Inspect the blower motor for any signs of damage or malfunction. If it is faulty, it may need to be replaced.
3. Test the Blower Motor Resistor: Test the blower motor resistor using a multimeter to check if it is functioning properly. If it is defective, it may need to be replaced.
4. Check the Blower Motor Relay: Test the blower motor relay to ensure it is working correctly. If it is faulty, it may need to be replaced.
5. Verify Coolant Level: Check the coolant level in the radiator and reservoir. If it is low, top it up to the recommended level. Ensure there are no coolant leaks in the system.
If these troubleshooting steps do not resolve the issue, it may be best to consult a certified Chevy mechanic or take your vehicle to a reputable auto repair shop for further diagnosis and repair.
Remember, these are general suggestions, and it’s always a good idea to consult a professional for an accurate diagnosis and appropriate repairs.
I hope this helps! Let me know if you have any other questions.

Why is my radiator fan not kicking in?

The most common reasons for a radiator fan not working can be a blown-out fuse, a bad relay, or a broken wire. The faulty coolant temp sensor might also be a reason behind it. Whatever the case, a dysfunctional radiator fan can be fatal.

How do I know if my car heater blower is bad?

1. Inadequate Airflow Through the Vents. If you notice little or no airflow coming from your car vents, you likely have a failing heater blower motor.

Why is my radiator fan not working in my Chevy Cobalt?

The most common reasons a Chevrolet Cobalt radiator fan isn’t working are the fan assembly, the fan clutch, or the coolant temperature sensor.

Is there a fuse for the heater fan?

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.

How much does it cost to fix a car heater blower?

On average, the total cost can range from $280 to $560, with labor taking one to three hours, depending on the complexity of the job. The location of the blower motor can affect labor costs, with some requiring the removal of a significant portion of the front dash to access the firewall.

Why would my heater fan stop working?

Problems include dirty filters, broken wires, poor voltage supply and faulty limit switch or capacitor. You can test your limit switch with a multimeter, and clean the blower motor’s wire coils. If this doesn’t work, you may need to replace your furnace blower motor.

Why is my heater fan not blowing?

Electrical Problems
The blower motor may be faulty or it could be a problem with the motor bearings. Another potential cause could be a clogged air filter, which can restrict airflow and cause the blower to malfunction. Additionally, incorrect thermostat settings can also prevent the blower from running properly.

How do you test a car heater blower motor?

Set it to continually it’ll look like this volume icon. And then touch the connectors to the heater blow made up pins. And then you should hear the following noise. You can also do resistance.

What stops a radiator fan from working?

It could be a problem with the fan motor, temperature sensor, fan control relay, or wiring. The Check Engine Light might come on. With modern cars, a DTC will be triggered that illuminates the light on the dash when it exceeds normal operating temperatures. It might be accompanied by a message on the cluster too.

How do you reset a blower motor?

Allow the blower to cool down, so that any metal components are safe to touch. Once the blower is cool, locate the reset button, which is usually red and located on the backside of the motor. If the reset button has popped, push it back in.