I have a 2013 Challenger R/T and when I was driving it home tonight, I rolled the temp knob to hot as it would go and it only blows cold air. I've also noticed that when I first start up the car and turn the knob to auto to start the heat or AC, nothing happens for 20 seconds. The defrost light in the position knob on the right just flashes. Is this a malfunctioning control assembly or does it sound like the actuator? What's frustrating is I bought this car new and it only has 23k miles on it. The fuel pump died on it two months ago and that was a $600 fix with the towing bill because dodge wouldn't warranty it so I know I'll be out of pocket to fix this too. :?