For some reason when I turn my AC or Heater on, it robs a lot of power. I have it looked at a few different times and none of the mechanics have ever heard of it, and couldn't even come up with an idea for troubleshooting. Someone help me! Could this be a vacuum leak? Once the AC or Heater are on they work fine, and being on low or high doesn't seem to make a difference-if it's on, it robs power. Also, the air conditioning smells like dirty feet. It's hot and I'm tired of it.