Fitment: 2008-2010 2012-2015 Mazda 5 Here are some common signs that your vehicle’s blower motor resistor is bad: Loss of HVAC fan control (total or certain speeds) The fan only works on its highest speed setting No air coming from vents Intermittent or inconsistent fan speed The blower motor resistor is an important component of the heating and cooling system of your car. As you turn on the heater or the AC, the fan starts, and air will start to get out of the vents. This fan will run because of the blower motor resistor. Therefore, when the latter is damaged, expect that you will experience discomfort in your car. .
