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Q: Heater , A/C Blower does not turn off on 1990 Pontiac Bonneville

I had my heater on high and when I went to turn the heater off, the "OFF" & "High/Low Blower Control" Settings did not work.
When I turned my engine off, the blower continued to blow on high.

I pulled out the fuses that mentioned anything about a/c under my steering wheel but it did not turn off the blower.

The only way to turn it off is to disconnect the battery.

What kind of repair am I look at here, Could this be a blower motor resistor issue?

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could be the resistor or could be a bad switch. but i try the resistor first is easy and cheapper.
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