Signs That Your Car’s Blower Motor Is Going Bad

May 30, 2019 2:41 pm Published by Leave your thoughts

Your vehicle’s blower motor is a crucial part of its heating and cooling systems. If you’re dealing with a bad blower motor, you’re going to have a much more difficult time taking control over the temperature of your vehicle’s interior. This might not have any effect on the operation of your vehicle, but it will definitely have an effect on your comfort level and will be a big nuisance during times of extreme temperature.

Therefore, if you notice any signs that you’ve got a bad blower motor on your hands, it’s important to reach out to a trusted mechanic in New Palestine, IN who can recommend the next steps for repairs and get it working again for you. Here are just a few of the signs that your blower motor is going bad.

Weak airflow

This is one of the first signs of a bad blower motor that people tend to notice. Your motor will wear out over time—this is just part of the general wear and tear your vehicle experiences. As this happens, it means the motor won’t be able to push as much air through your vehicle’s HVAC system, so you’ll start to notice that the blowers aren’t nearly as powerful as they once were. You might also notice that the fan works at some speeds, but not at others, or that once you reach a certain speed the fan doesn’t work at all.

This doesn’t just result in poor airflow through the vents that heat or cool your cabin—it also results in decreased efficiency of the defroster, which uses that same fan to blow air at the windshield.

There are several components that could have issues resulting in these problems, so it’s important to have the issue properly diagnosed by a professional mechanic before you proceed under the assumption that it’s your blower motor. But regardless, this is a problem that will quickly become a nuisance.


Have you noticed any unusual noises coming from your vehicle’s HVAC system? It’s not unusual for some foreign objects to get sucked into the engine compartment and get caught in the blower motor fan. These blades are plastic, so they can get damaged fairly easily, or even snap off. If this happens, you’ll likely notice a noise that comes from right behind the vent, such as a slapping or a sudden pop, followed by problems with your airflow. You might also hear ongoing whirring noises, or noises that change or get louder if you increase the fan speed. These are all signs of problems with the blower motor.

Smoke or smells

In some cases, you may even notice smoke or smells of burning while driving, in which case you should pull over immediately. A blower motor that’s burned out won’t wreck your car, but you also cannot be sure right away that it’s the blower motor that’s smoking. You should get your vehicle checked out before you continue to drive at all if you notice these issues.

For more information about problems indicating a blown blower motor, reach out to Auto Air & Heating, Inc. today to speak with an experienced mechanic in New Palestine, IN.

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