I have a 2021 Mazda 3 preferred. The cabin fan only works on High but blows very weak. I assume like all my other cars that’s it's a bad Fan Blower resister. I searched for the part online and even contacted the dealer parts dept and they said it doesn’t exist?> HOW? Is it built into the fan motor? I am baffled as to what car doesn’t have a replaceable Fan Blower Motor Resistor?