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If your talking about the fan setting it sounds like the switch is bad. Possibly a bad switch, but more likely a bad blower motor resistor, which you can purchase at most auto parts stores for $20.

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โˆ™ 2007-09-17 19:33:53
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Q: Why does the A C only work on low and high settings but not on the middle settings on a 2000 Buick Regal?
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