Hey ETCG i have a 2006 Chevy Impala police package. The problem I am having is with the heater controls. They work fine it gets hot and it will get cold like it should, but if I put the temp nob all the way down it will click really loud from under the dash. still clicks with the car off, and will keep going for a couple min. I cant seam to find the source anywhere, and it sounds like it is behind the radio but there is nothing there. If i leave the temp nob just barley off fully cold it works fine. so i am kind of puzzled on what it could be. Do you have any ideas on what i should check out. Thank you for any advice.