Postby smj999smj » Thu Sep 25, 2014 12:46 pm
The blower resistor only controls the speed of the fan. If the resistor burns out, it will usually allow only high speed operation of the fan...or, rarely, no operation at all by the fan. Your symptoms don't sound like that of a bad resistor. You don't state whether it's manual A/C or auto climate control. If it's the later, it "could" be a faulty control unit. My advice would be to download a factory service manual, or at least the heating and A/C section of the factory service manual, for your vehicle and use the symptom chart, diagnostic procedure(s) it points to, and the electrical diagrams to diagnose the problem, if that is something in your ability to do and you have the equipment to do so, typically a 12V test light and multimeter. If this is beyond what you feel comfortable with, I would recommend you have a reputable mechanic have a look at it.