2006 Scion XB has been over heating when AC is on

2006 Scion XBMy car has been over heating when AC is on. I noticed the AC fan wont kick on either. After my sitting for a month my car wouldn’t start. We jumped it showed signs of alternator failure. Would this most likely be the serpentine belt? Or any ideas so I don’t go out buying stuff I don’t need. Thanks


If the serpentine belt is missing, it should take care of some issues installing a replacement.

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