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There might be a ghost in my 05 Outback XT

Ok it is almost like there is a ghost in my car. First the A/C was stuck at the same setting fora week (Defrost and 2 bars of fan). Couldn’t turn it off or change the a/c in any way. Now today the A/C started working again however when I went to adjust the volume on my stereo, nothing happened. Again I could not change anything or even turn it off. 20 Minutes later after struggling to hear my NPR, the stereo miraculously started working. What is happening? All the fuses are fine. Do I need to do an exorcism?

Have the alternator checked out to see if there is any AC voltage getting to the battery. There may be excessive ripple causing the trouble.