My seats in my 2007 NB convertible have gotten very hot since I got it in 2015. (Last night while set on “2”. My passenger complained about the heat but she was not in the car for long. (No, I did not turn off the warmer after dropped her off- mistake )then on my way home I started smelling something burning. The leather seat has scorch marks. I pulled the fuse out because I am afraid of a fire. Any one else have this issue? Do I need to replace the whole seat??