In the collective experience of other forum members how well do the seat heaters work?
I ask this because I'm trying to determine if mine work at all. My car has not been used in the winter and I just got it out of the garage last weekend and have used the seat heaters on cool days, around 35f. If they are working it's very subtle.
I rented a Chevy Cruze for a week at one point over the winter during a period when it was very cold, around zero f. They worked like a charm, they got very hot within a minute and had to be turned down to their medium or low setting after that, and they were still nice and warm. What I feel in the Crossfire is next to nothing on either setting.

 

If you doubt they are working at all, you could prove it by using a handheld heat scanner. Do not sit on the seat just start the car and turn the seat heaters on.
Check the fuse, #24 , 30 amp.