Common Signs of a Faulty Chevrolet Blower Motor
A well-functioning blower motor is essential to the heating and cooling system of your vehicle. Designed to compel the heated and cooled air to the vehicle's interior and adjust the internal temperature, a broken Chevrolet blower motor can make your ride quite uncomfortable. When a blower motor malfunctions, it usually displays some signs. You can conduct some simple tests to verify if the issue is with the blower or some other parts in the system.
Noisy motor when running
Usually, when the blower motor starts producing some noises while working, it may mean an internal breakdown. Internal failures in a Chevrolet blower motor include a broken bearing in the motor, a bent shaft, or a loose blower cage. All these can cause the motor to make some sounds. However, other foreign materials, such as sands or leaves that are dropped into dash vents, can also cause the noises when these materials reach the blower cage. When your Chevy is noisy, take out the motor to confirm that the error is with the motor itself. You can do this by disconnecting the motor wire connector. The motor has an attached cage to the shaft that can produce tremendous noise when misaligned. This may also wear down the motor's bearing faster.
When a Chevrolet blower motor seizes and stops functioning, a broken bearing may trigger the seizures while an electrical breakdown of the motor may cause itself to stop working. Nevertheless, electrical malfunctions in the air conditioning system may also create similar signs. Make sure to verify whether the problems arising are due to the blower. However, conduct electrical assessments on the motor only when the blower is secured in a bench vise. To test the motor operation with taking it out of your Chevy, simply find the electrical connection to the motor and detach it. You may use jumper wires with alligator clips and electrical probes on the ends. If the motor turns, the motor is functional. Some other part in the air conditioning system is malfunctioning. Do this test quickly to avoid damaging the motor or its circuit.
Hot motor resistors
Because the motor resistor block in the air conditioning system is fitted near the cage, when this part malfunctions, it typically suffers heat damage. You can actually see some melted spots and may oftentimes smell something like burnt hair. However, repairing the issues in this system can be done by an experienced DIYer with just the basic tools. You can check your vehicle repair manuals for the diagnostic charts. Most replacement parts in the Chevrolet blower motor system are easily available in online stores as well as reputable auto parts shops.
When the resistor block is defective or the fuse is drawing too much amperage, the fuse may eventually get toasted. You can do a quick diagnosis by doing a test light. If the test shows no voltage at the fan, this means the fuse is operational. Make sure to inspect the connector for damage.