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A/C Fan Speed Control, 1998 Wrangler

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My Wrangler has the A/C control with the knob (for controlling fan speed) and two sliders (for controlling temperature and mode). The fan only works on positions 3 and 4. After 30 minutes or so my face has formed icicles and there are penguins playing in the back seat. I really would prefer that the fan also operated on the 1 and 2 positions.

 

Before I go tearing things apart, is there anything else I should be looking at besides replacing the fan speed knob?

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Yep that would be the problem. You can check the resistance. Resistance should go down as speed increases.

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I finally got around to replacing the resistor last week. The old one was a brittle rusty thing lodged full of cobwebs. I put in the new one, and cool... I now have all four fan speeds.

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