Fitment: 2003-2011 Saab 9-3 with Automatic Temperature Control 2010-2011 Saab 9-3X with Automatic Temperature Control 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 .