Used Hyundai hatchbacks for sale near Englewood Cliffs, NJ

I purchased my car used. It was a trade-in to a Toyota dealer in San Antonio, Texas. It started off as a rental in Florida and I am the 3rd individual to own it. It has been an overall good car. But, the AC control knob that controls the fan speed has gotten stuck om low. I can still control the temp, but on cold mornings, it takes forever to defrost the windows, and om hot days, forever to cool the car. Also, there are times the screen that shows the back-up camera doesn't work. There are big-time blind spots with this car, so the camera is necessary. When the screen goes out, so does the radio. I am unable to turn it on, no volume, or changing stations. It's as if there is no radio at all. I thought at first I may need a new control knob, but now I am thinking there may be a wiring problem... such as a disconnect exfed or burned wire. I don't think it's a fuse. If so, it wouldn't work at all. Any suggestions?

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Bought the 2012 Veloster shortly after its introduction. It has all of the trim options available, though I never learned to use them. This car has had a lot of pesky recalls, but that is like a lot of vehicles. There have been NO problems for my car, except for an inexpensive part repair in the steering column at about 90K miles. I bought this car because of 1) the great m.p.g., 2) the sporty appearance, and 3) to more easily navigate city traffic. My only complaints are: 1) the seats are not well-padded nor provide lumbar support, but they hold you great when zipping around sharp curves in the mountains, 2) it sits so low to the ground (as sporty cars do), which make it difficult for a tall and older person to get in and out. Those who desire a lot of power would probably be disappointed.