AC Knob Levels on 2003 Chevrolet Malibu

AC has 5 power levels - 1-is fan and 2-5 is speed for AC. Problem is Fan nor AC does not turn on unless I turn the know to Level 4.

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1 answer
You need to go to your local autoparts store and replace the blower resistor. It is something you could do and it only cost around $25. It's under the dash on the passenger side. Eventually 4 and 5 will go out too.