The blower motor resistor of your car mainly functions as a regulator of the air temperature released by the electrically powered fan on the vehicle. It determines the air settings in your car while also making sure that the motor is only releasing the right amount of airflow. But, if your Nissan Xterra blower motor resistor is defective, it could be very difficult for you to regulate how much air should be blown during the entire time that your vehicle is running. Here are some of the most common and noticeable signs of a defective blower motor resistor:
A fully functional blower motor resistor is supposed to accelerate and decelerate the airflow in your vehicle. A defective one, however, fails to decelerate and only works at very high speed. You can easily notice this if the airflow in your vehicle seems to be working on the highest level despite the fact that it is already well ventilated inside. If this persists, there is a possibility for your air conditioning unit to also get affected and get damaged eventually. So when you notice deceleration difficulties on your blower motor resistor, have it checked or replaced immediately.
The blower motor resistor is controlled through a certain switch. And if this switch starts acting up, it would be difficult for you to fully control your blower motor resistor. You can notice switch problems when your blower motor does not follow the command you are willing it to do. When this happens, it would be better to take your vehicle to a mechanic and have the blower motor resistor repaired to fully enjoy its function.
As with all the electrically powered parts in your vehicle, there also comes a time when your blower motor resistor defies electricity. As a result, your resistor will stop working or you won't be able to change its speed no matter how you reset the settings. This can be problematic for you because you won't be able to achieve the right airflow level for the vehicle. This can be a little difficult to notice, but once you do, make sure that you get it repaired right away.