If your car has an overcharged AC unit, you may be able to fix it yourself. Here are a few tips to help you fix the issue:

  1. Check the voltage in the AC unit. If it is too high, you may need to lower the voltage to make it work properly.
  2. Check the capacitor. If it is low, your AC unit may not be able to generate enough power to run properly.
  3. Check the filter. If it is dirty, it may not be able to remove all of the dirt and dust from the air conditioning system. This can cause your AC unit to overheat and start making noise.