Defroster/defogger/hvac System problems of the 2013 Hyundai Veloster

The contact owns a 2013 Hyundai Veloster. The contact stated that the highest dial setting of the a/c unit had failed to operate as needed. Upon repairing the dial setting on his own, the contact discovered that the dial had burned out. The contact stated that after the repair, the failure recurred nearly a week later. The contact discovered that the dial had burned out again. The dealer was notified of the failure, and the contact was given an estimate for a diagnostic test. The contact stated that failure had caused the defrost system to function poorly, which reduced the road's visibility while driving. The vehicle was not repaired. The manufacturer had yet to be notified of the failure. The failure mileage was approximately 123,000.