enter image description hereLast year I changed out my father's 2003 Dodge Ram van's blower motor resistor after hearing complaints about his AC only working on high.

I did some googling and found that many people pointed their fingers at the blower motor resistor being the problem so I swapped it for a new one and it worked...for about a month and a half.

Could there be another problem causing the AC to work only on high, or is it the resistor again?

  • Sounds like you just got a bad resistor pack. I've had one die on me in a short time. In my truck, it goes strait to high fan speed and stays there with the truck shut off. You have to pull the fuse until you get a new resistor for it. Mar 7, 2017 at 2:21
  • thanks for passing on the knowledge! What does lulling the fuse do/prevent? Mar 7, 2017 at 3:15
  • If not the resister i would replace the control switch for the blower.
    – David Ward
    Mar 7, 2017 at 12:25
  • @Pᴀᴜʟsᴛᴇʀ2 probably has to pull the fuse because it's likely a pwm system with a control module and not really a resister. in your case it wouldn't help. you see this in newer hyundais and kias as well.
    – Ben
    Mar 7, 2017 at 14:01
  • @Ben - Yah, it's because of how GM does their thing. I don't know why they provide power all the time to the blower resistor, but that's the way they designed it. Especially when the blown resistor provides a means to give full power to the fan. I guess my comments have confused things for the OP. Mar 7, 2017 at 14:07


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