Hi I have a problem with my blend control when I turn it all the way to cold it makes a clicking sound and if I move it away from cold a little bit it stop and same for heat. I had motor replaced 1 year 1 month ago just took it in and they said it could be motor again or blend door. My problem is if it is motor its covered by warranty but if its the door it self its not. Can anyone give me some advice on what I should do I am handy enough to tackle most anything but if its under warranty then I'd rather not mess with it