It just now started to get cold so I decided to turn my heater on and I turned it over to the red or hot side and it still blows cold.I ened up pulling my dash apart the other day to hook up a ipod cord and I found that there was nothing plugged into where your turn it to hot/cold. I am assuming there should be something there since there is a plug but maybe I'm wrong. I have look everywhere for a plug and have found nothing. Can someone look and see if theres a plug there in your truck. Any help would be great.