I have a 1999 S80 and in recent weeks it was getting very hot in one spot (my right cheek), almost to the point where it was burning me. Now the seats won't heat at all, driver or passenger side. I checked the fuse and it is in good condition. The panel switch lights up when I press it. What is causing the seat warmers not to work?

Please advise as it is incredibly cold here in Minnesota!

 

At this point, you need to replace the heater element in your seat. Same thing happened to me. You'll have to take the seat out.